Updated on 2024/10/11

写真a

 
YAJIMA Takeshi
 
Organization
Graduate School of Engineering Materials Design Innovation Engineering 3 Associate professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Materials Science and Engineering
Title
Associate professor
Contact information
メールアドレス
Homepage
http://www.numse.nagoya-u.ac.jp/LIB/index.html
External link

Degree 1

  1. Doctor of Science （ 2010.3   The University of Tokyo ） 

To the head of Degree.▲

Research Areas 1

  1. Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry

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Research History 5

  1. Nagoya University   School of Engineering Materials Science and Engineering   Associate professor

    2023.4

  2. Nagoya University   Graduate School of Engineering Materials Design Innovation Engineering 3   Associate professor

    2023.4

  3. The University of Tokyo   ISSP, Materials Design and Characterization Laboratory   Assistant Professor

    2013.7 - 2023.3

  4. Kyoto University

    2012.12 - 2013.6

  5. Kyoto University

    2010.4 - 2012.11

To the head of Research History.▲

Education 3

  1. The University of Tokyo

    - 2010.3

  2. The University of Tokyo

    - 2007.3

  3. The University of Tokyo

    - 2005.3

To the head of Education.▲

Professional Memberships 4

  1. 電気化学会

  2. 日本セラミックス協会

  3. 日本物理学会

  4. 応用物理学会

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Committee Memberships 2

  1. 電気化学会   第91回大会 現地実行委員  

    2023.4 - 2024.3   

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    Committee type：Academic society

  2. 日本物理学会   領域8 運営委員  

    2018.4 - 2019.3   

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    Committee type：Academic society

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Papers 89

  1. Origin of O2 Generation in Sulfide-Based All-Solid-State Batteries and its Impact on High Energy Density

    Yoshikawa K., Kato T., Suzuki Y., Shiota A., Ohnishi T., Amezawa K., Nakao A., Yajima T., Iriyama Y.

    Advanced Science   Vol. 11 ( 34 ) page： e2402528   2024.9

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    Language：English   Publisher：Advanced Science  

    The cathode surface of sulfide-based all-solid-state batteries (SBs) is commonly coated with amorphous-LiNbO3 in order to stabilize charge–discharge reactions. However, high-voltage charging diminishes the advantages, which is caused by problems with the amorphous-LiNbO3 coating layer. This study has investigated the degradation of amorphous-LiNbO3 coating layer directly during the high-voltage charging of SBs. O2 generation via Li extraction from the amorphous-LiNbO3 coating layer is observed using electrochemical gas analysis and electrochemical X-ray photoelectron spectroscopy. This O2 leads to the formation of an oxidative solid electrolyte (SE) around the coating layer and degrades the battery performance. On the other hand, elemental substitution (i.e., amorphous-LiNbxP1-xO3) reduces O2 release, leading to stable high-voltage charge–discharge reactions of SBs. The results have emphasized that the suppression of O2 generation is a key factor in improving the energy density of SBs.

    DOI： 10.1002/advs.202402528

    Scopus

    PubMed

  2. Geometric frustration and Dzyaloshinskii-Moriya interactions in a quantum star lattice hybrid copper sulfate Reviewed International coauthorship

    Hajime Ishikawa, Yuto Ishii, Takeshi Yajima, Yasuhiro H Matsuda, Koichi Kindo, Yusei Shimizu, Ioannis Rousochatzakis, Ulrich K Rößler, Oleg Janson

    Physical Review B   Vol. 109 ( 18 ) page： L180401   2024.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： https://doi.org/10.1103/PhysRevB.109.L180401

  3. Li concentration change around Cu/LiPON interface measured by TOF-ERDA

    Kurihara K., Nakamizo S., Yamamoto S., Yasuda K., Majima T., Yajima T., Iriyama Y.

    Journal of Solid State Electrochemistry     2024

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    Publisher：Journal of Solid State Electrochemistry  

    Lithium metal is a promising anode material for the development of advanced all-solid-state batteries (ASSBs) with high energy density. Among the various solid electrolytes, lithium phosphorus oxynitride glass electrolyte (LiPON) is notable for facilitating stable Li plating-stripping reactions in ASSBs employing Li metal. The aim of this study is to examine the Li/LiPON interface, with a specific emphasis on the reductive decomposition of LiPON near this interface. We employed time-of-flight elastic recoil detection analysis (TOF-ERDA) to assess changes in Li concentration around the Cu/LiPON interface immediately prior to the Li plating reaction. Our electrochemical measurements indicate that critical decomposition of LiPON occurs when the voltage at the Cu electrode is reduced to 0.1 V vs. Li/Li+ at 25 °C, resulting in the in situ formation of Li3P operating at 0.7 V vs. Li/Li+ as an anode material. The TOF-ERDA findings reveal that this decomposition reaction results in a layer with partial decomposition (ranging from 5 to 25% on average) extending up to approximately 30 nm from the Cu/LiPON interface. This insight is vital for enhancing the design and performance of ASSBs. Graphical abstract: (Figure presented.)

    DOI： 10.1007/s10008-024-05865-y

    Scopus

  4. Asagiite, NiCu<sub>4</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub>·6H<sub>2</sub>O, a new member of the ktenasite group from the Nakauri mine, Shinshiro City, Aichi Prefecture, Japan Reviewed

    NISHIO-HAMANE Daisuke, YAJIMA Takeshi, SHIMOBAYASHI Norimasa, OHNISHI Masayuki, NIWA Takefumi

    Journal of Mineralogical and Petrological Sciences   Vol. 118 ( 1 ) page： n/a - 8   2023.10

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    Language：English   Publisher：Japan Association of Mineralogical Sciences  

    <p>Asagiite, a newly-discovered mineral having the ideal formula NiCu<sub>4</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub>·6H<sub>2</sub>O, is a member of the ktenasite group, representing a Ni analogue. It occurs as a secondary mineral on smithsonite aggregates that overlie fractures in a serpentinite found in the Nakauri mine within Aichi Prefecture, Japan. Asagiite exhibits a unique pale blue-green coloration and so is named after the traditional Japanese color ‘asagi-iro’. Asagiite occurs as thin plate-like crystals with perfect cleavage along {001} planes. The crystal size of this mineral is typically 0.1-0.2 mm, although in rare cases crystals may range up to 0.5 mm in length. These crystals are vitreous, transparent and non-fluorescent and have also been shown to be brittle with a Mohs hardness of 2½. The measured and calculated densities of asagiite are 2.90(3) and 2.92 g·cm<sup>−3</sup>, respectively. This mineral is optically biaxial (−) with <i>α</i> = 1.577(2), <i>β</i> = 1.620(2), and <i>γ</i> = 1.631(2) together with a 2<i>V</i><sub>calc</sub> value of 52.4°. Electron microprobe analyses determined an empirical formula (based on 2S) of (Cu<sub>3.44</sub>Ni<sub>0.76</sub>Zn<sub>0.59</sub>Co<sub>0.18</sub>Fe<sub>0.01</sub>)<sub>Σ4.98</sub>S<sub>2</sub>O<sub>7.95</sub>(OH)<sub>6.05</sub>·6H<sub>2</sub>O. Based on single crystal X-ray diffraction data, the structure is monoclinic with space group <i>P</i>2<sub>1</sub>/<i>c</i> and unit cell parameters <i>a</i> = 5.6095(8), <i>b</i> = 6.1259(7), <i>c</i> = 23.758(3) Å, <i>β</i> = 95.288(4)°, <i>V</i> = 812.92(17) Å<sup>3</sup>, and <i>Z</i> = 2. Single-crystal structural determination also gives an <i>R</i><sub>1</sub> value of 0.0303. The seven most intense peaks in the powder X-ray diffraction pattern [<i>d</i> in Å (<i>I</i>/<i>I</i><sub>0</sub>) <i>hkl</i>] were found to be 11.830 (100) 002, 5.912 (64) 004, 4.845 (55) 013, 3.920 (45) 006, 2.953 (33) 008, 2.668 (57) 202, and 2.571 (36) 12<span style="text-decoration: overline;">3</span>, with unit cell parameters of <i>a</i> = 5.614(5), <i>b</i> = 6.108(8), <i>c</i> = 23.758(18) Å, <i>β</i> = 95.62(7)°, and <i>V</i> = 810.8(14) Å<sup>3</sup>.</p>

    DOI： 10.2465/jmps.230711

    Scopus

    CiNii Research

  5. Breathing pyrochlore magnet CuGaCr4S8 : Magnetic, thermodynamic, and dielectric properties Reviewed International coauthorship

    Masaki Gen, Hajime Ishikawa, Atsushi Miyake, Takeshi Yajima, Harald O. Jeschke, Hajime Sagayama, Akihiko Ikeda, Yasuhiro H. Matsuda, Koichi Kindo, Masashi Tokunaga, Yoshimitsu Kohama, Takashi Kurumaji, Yusuke Tokunaga, and Taka-hisa Arima

    PHYSICAL REVIEW MATERIALS   Vol. 7   page： 104404   2023.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： https://doi.org/10.1103/PhysRevMaterials.7.104404

  6. Kiryuite and gunmaite, two new minerals from Tsukubara, Kiryu City, Gunma Prefecture, Japan Reviewed

    NISHIO-HAMANE Daisuke, YAJIMA Takeshi, IKARI Issei, OHKI Yoshiya, HORI Hirofumi, OHARA Yoshihiro

    Journal of Mineralogical and Petrological Sciences   Vol. 118 ( 1 ) page： n/a   2023.9

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    Language：English   Publisher：Japan Association of Mineralogical Sciences  

    <p>Kiryuite and gunmaite were found as new minerals from Tsukubara, Kiryu City, Gunma Prefecture, Japan. Kiryuite is a Mn-rich analogue of viitaniemiite with an ideal formula of NaMnAl(PO<sub>4</sub>)F<sub>3</sub> that mainly occurs as a white powder in cracks in triplite aggregate and occasionally forms porous plate-like aggregates up to 5 mm in size, while the grains are several micrometers in size. In most cases, the aggregates are also accompanied by small amounts of other minerals such as goyazite, gorceixite, and fluorite. Kiryuite shows white streaks with a vitreous luster, and its Mohs hardness is estimated to be 5 by analogy with viitaniemiite. The calculated density is 3.32 g·cm<sup>−3</sup> based on the empirical formula and unit cell volume refined from powder X-ray diffraction (XRD) data. The empirical formula for kiryuite calculated on the basis of O = 4 and F + OH = 3 is Na<sub>0.97</sub>(Mn<sub>0.56</sub>Ca<sub>0.38</sub>Fe<sub>0.04</sub>Mg<sub>0.02</sub>)<sub>Σ1.00</sub>Al<sub>0.98</sub>P<sub>1.02</sub>O<sub>4</sub>(F<sub>2.29</sub>OH<sub>0.71</sub>)<sub>Σ3</sub>. Kiryuite is monoclinic (<i>P</i>2<sub>1</sub>/<i>m</i>) with <i>a</i> = 5.425(4) Å, <i>b</i> = 7.128(4) Å, <i>c</i> = 6.817(6) Å, <i>β</i> = 109.41(7)°, and <i>V</i> = 248.7(3) Å<sup>3</sup> (<i>Z</i> = 2). The parameters [<i>d</i> in Å (<i>I</i>/<i>I</i><sub>0</sub>) <i>hkl</i>] for the six strongest lines associated with kiryuite in the powder XRD pattern are 3.123 (57) 002, 2.923 (53) 012 and 120, 2.877 (100) 12<span style="text-decoration: overline;">1</span>, 2.560 (27) 200, 2.263 (43) 10<span style="text-decoration: overline;">3</span>, and 2.155 (76) 22<span style="text-decoration: overline;">1</span>. Gunmaite is a new alunite-related mineral with a new structure type that has an ideal formula of (Na<sub>2</sub>Sr)Sr<sub>2</sub>Al<sub>10</sub>(PO<sub>4</sub>)<sub>4</sub>F<sub>14</sub>(OH)<sub>12</sub>. Gunmaite mainly occurs as a core in hexagonal tablet crystals that coexist with gorceixite and goyazite-like minerals. Gunmaite is colorless and transparent with a greasy to resinous luster and is non-fluorescent. As a bulk crystal including gunmaite, the Mohs hardness is 5, cleavage is perfect on {001} planes, and the tenacity is brittle. The calculated density based on the empirical formula is 3.38 g·cm<sup>−3</sup> using the empirical formula and single-crystal XRD data. The empirical formula for gunmaite calculated on the basis of O = 16 and F + OH = 26 is (Na<sub>1.72</sub>Sr<sub>0.70</sub>Mg<sub>0.56</sub>Ca<sub>0.01</sub>)<sub>Σ2.99</sub>(Sr<sub>1.32</sub>Ba<sub>0.68</sub>)<sub>Σ2</sub>(Al<sub>9.82</sub>Mg<sub>0.18</sub>)<sub>Σ10</sub>P<sub>3.99</sub>O<sub>16</sub>F<sub>16.21</sub>(OH)<sub>9.79</sub>. Gunmaite is trigonal (<i>R</i><span style="text-decoration: overline;">3</span><i>m</i>) with <i>a</i> = 6.9972(2) Å, <i>c</i> = 50.270(2) Å, and <i>V</i> = 2131.51(13) Å<sup>3</sup> (<i>Z</i> = 3). The structure consists of two PO<sub>4</sub>, AlO<sub>2</sub>(OH)<sub>4</sub>, AlF<sub>6</sub>, AlOF<sub>3</sub>(OH)<sub>2</sub>, SrO<sub>6</sub>(OH)<sub>6</sub>, and NaF<sub>8</sub> polyhedra. Kiryuite and gunmaite are products of the final stage of hydrothermal activity in association with greisenization.</p>

    DOI： 10.2465/jmps.230605

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    CiNii Research

  7. Signatures of a magnetic superstructure phase induced by ultrahigh magnetic fields in a breathing pyrochlore antiferromagnet Reviewed

    Masaki Gen, Akihiko Ikeda, Kazushi Aoyama, Harald O. Jeschke, Yuto Ishii, Hajime Ishikawa, Takeshi Yajima, Yoshihiko Okamoto, Xuguang Zhou, Daisuke Nakamura, Shojiro Takeyama, Koichi Kindo, Yasuhiro H. Matsuda, Yoshimitsu Kohama

    Proceedings of the National Academy of Sciences   Vol. 120 ( 33 )   2023.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Proceedings of the National Academy of Sciences  

    DOI： 10.1073/pnas.2302756120

  8. Superconductivity at 12 K in La2IOs2 : A 5d metal with osmium honeycomb layer Reviewed

    Hajime Ishikawa, Takeshi Yajima, Daisuke Nishio-Hamane, Shusaku Imajo, Koichi Kindo, Mitsuaki Kawamura

    Physical Review Materials     2023.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevMaterials.7.054804

  9. Space-Group Determination of Superlattice Structure Due to Electric Toroidal Ordering in Ca5Ir3O12 Reviewed

    Hanate Hiroki, Tsutsui Satoshi, Yajima Takeshi, Nakao Hironori, Sagayama Hajime, Hasegawa Takumi, Matsuhira Kazuyuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 92 ( 6 )   2023.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7566/JPSJ.92.063601

    Web of Science

  10. Spin-Peierls transition to a Haldane phase Reviewed

    Yamaguchi Hironori, Takahashi Hiroki, Kawakami Takashi, Okamoto Kiyomi, Sakai Toru, Yajima Takeshi, Iwasaki Yoshiki

    PHYSICAL REVIEW B   Vol. 107 ( 16 )   2023.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevB.107.L161111

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  11. Large magnetic-field-induced strains in sintered chromium tellurides Reviewed

    Kubota Yuki, Okamoto Yoshihiko, Kanematsu Tomoya, Yajima Takeshi, Hirai Daigorou, Takenaka Koshi

    APPLIED PHYSICS LETTERS   Vol. 122 ( 4 )   2023.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Applied Physics Letters  

    DOI： 10.1063/5.0134911

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    Scopus

  12. Ferroelectric Transition of a Chiral Molecular Crystal BINOL center dot 2DMSO Reviewed

    Nomura Toshihiro, Yajima Takeshi, Yang Zhuo, Kurihara Ryosuke, Ishii Yuto, Tokunaga Masashi, Matsuda Yasuhiro H., Kohama Yoshimitsu, Kimura Kenta, Kimura Tsuyoshi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 91 ( 6 )   2022.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of the Physical Society of Japan  

    DOI： 10.7566/JPSJ.91.064702

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    Scopus

  13. SmI3: 4f(5) honeycomb magnet with spin-orbital entangled Gamma(7) Kramers doublet Reviewed

    Ishikawa Hajime, Kurihara Ryosuke, Yajima Takeshi, Nishio-Hamane Daisuke, Shimizu Yusei, Sakakibara Toshiro, Matsuo Akira, Kindo Koichi

    PHYSICAL REVIEW MATERIALS   Vol. 6 ( 6 )   2022.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Physical Review Materials  

    DOI： 10.1103/PhysRevMaterials.6.064405

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  14. Generating 77 T using a portable pulse magnet for single-shot quantum beam experiments (vol 120, 142403, 2022) Reviewed

    Ikeda Akihiko, Matsuda Yasuhiro H., Zhou Xuguang, Peng Shiyue, Ishii Yuto, Yajima Takeshi, Kubota Yuya, Inoue Ichiro, Inubushi Yuichi, Tono Kensuke, Yabashi Makina

    APPLIED PHYSICS LETTERS   Vol. 120 ( 19 )   2022.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Applied Physics Letters  

    DOI： 10.1063/5.0097298

    Web of Science

    Scopus

  15. Generating 77 T using a portable pulse magnet for single-shot quantum beam experiments Reviewed

    Ikeda Akihiko, Matsuda Yasuhiro H., Zhou Xuguang, Peng Shiyue, Ishii Yuto, Yajima Takeshi, Kubota Yuya, Inoue Ichiro, Inubushi Yuichi, Tono Kensuke, Yabashi Makina

    APPLIED PHYSICS LETTERS   Vol. 120 ( 14 )   2022.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Applied Physics Letters  

    DOI： 10.1063/5.0088134

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    Scopus

  16. Large Magnetic-Field-Induced Strain at the Spin-Reorientation Transition in A-Site Ordered Spinel Oxide LiFeCr4O8 Reviewed

    Yoshihiko Okamoto, Tomoya Kanematsu, Yuki Kubota, Takeshi Yajima, Koshi Takenaka

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 91 ( 2 )   2022.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.91.023710

    Web of Science

    Scopus

  17. High-Pressure Synthesis of Transition-Metal Oxyhydrides with Double-Perovskite Structures Reviewed

    Takeshi Yajima, Kanako Takahashi, Hotaka Nakajima, Takashi Honda, Kazutaka Ikeda, Toshiya Otomo, Zenji Hiroi

    INORGANIC CHEMISTRY   Vol. 61 ( 4 ) page： 2010 - 2016   2022.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    DOI： 10.1021/acs.inorgchem.1c03162

    Web of Science

    Scopus

    PubMed

  18. Dimer Crystallization Induced by Elemental Substitution in the Honeycomb Lattice of Ru1-xOsxCl3 Reviewed

    Kota Kataoka, Dirk Wulferding, Takeshi Yajima, Daisuke Nishio-Hamane, Daigorou Hirai, Seungyeol Lee, Kwang-Yong Choi, Zenji Hiroi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 91 ( 1 )   2022.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.91.014801

    Web of Science

    Scopus

  19. GdV6Sn6: A Multi-carrier Metal with Non-magnetic 3d-electron Kagome Bands and 4f-electron Magnetism Reviewed

    Hajime Ishikawa, Takeshi Yajima, Mitsuaki Kawamura, Hiroyuki Mitamura, Koichi Kindo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 90 ( 12 )   2021.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.90.124704

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  20. Phase transition in the 5d(1) double perovskite Ba2CaReO6 induced by high magnetic field Reviewed

    Hajime Ishikawa, Daigorou Hirai, Akihiko Ikeda, Masaki Gen, Takeshi Yajima, Akira Matsuo, Yasuhiro H. Matsuda, Zenji Hiroi, Koichi Kindo

    PHYSICAL REVIEW B   Vol. 104 ( 17 )   2021.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    DOI： 10.1103/PhysRevB.104.174422

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  21. Emergent antiferromagnetic transition in hyperkagome manganese Zn2Mn3O8 Reviewed

    Suguru Kitani, Takeshi Yajima, Hitoshi Kawaji

    PHYSICAL REVIEW MATERIALS   Vol. 5 ( 9 )   2021.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    DOI： 10.1103/PhysRevMaterials.5.094411

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  22. Gapped ground state in a spin-1/2 frustrated square lattice Reviewed

    H. Yamaguchi, N. Uemoto, T. Okubo, Y. Kono, S. Kittaka, T. Sakakibara, T. Yajima, S. Shimono, Y. Iwasaki, Y. Hosokoshi

    PHYSICAL REVIEW B   Vol. 104 ( 6 )   2021.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    DOI： 10.1103/PhysRevB.104.L060411

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  23. Correlated Li-ion migration in the superionic conductor Li10GeP2S12 Reviewed

    Takeshi Yajima, Yoyo Hinuma, Satoshi Hori, Rui Iwasaki, Ryoji Kanno, Takashi Ohhara, Akiko Nakao, Koji Munakata, Zenji Hiroi

    JOURNAL OF MATERIALS CHEMISTRY A   Vol. 9 ( 18 ) page： 11278 - 11284   2021.5

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

    DOI： 10.1039/d1ta00552a

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  24. Ligand dependent magnetism of the J(eff)=3/2 Mott insulator Cs2MX6 (M = Ta, Nb, X = Br, Cl) Reviewed

    Hajime Ishikawa, Takeshi Yajima, Akira Matsuo, Koichi Kindo

    JOURNAL OF PHYSICS-CONDENSED MATTER   Vol. 33 ( 12 )   2021.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP PUBLISHING LTD  

    DOI： 10.1088/1361-648X/abd7b5

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  25. Pressure-Induced Collapse Transition in BaTi(2)Pn(2)O (Pn = As, Sb) with an Unusual Pn-Pn Bond Elongation Reviewed

    Takafumi Yamamoto, Takeshi Yajima, Zhi Li, Takateru Kawakami, Kousuke Nakano, Takami Tohyama, Takehiko Yagi, Yoji Kobayashi, Hiroshi Kageyama

    INORGANIC CHEMISTRY   Vol. 60 ( 4 ) page： 2228 - 2233   2021.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    DOI： 10.1021/acs.inorgchem.0c02989

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  26. Structural Phase Diagram of LaO1-xFxBiSSe: Suppression of the Structural Phase Transition by Partial F Substitutions Reviewed

    Kazuhisa Hoshi, Shunsuke Sakuragi, Takeshi Yajima, Yosuke Goto, Akira Miura, Chikako Moriyoshi, Yoshihiro Kuroiwa, Yoshikazu Mizuguchi

    CONDENSED MATTER   Vol. 5 ( 4 ) page： 1 - 10   2020.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI  

    DOI： 10.3390/condmat5040081

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  27. Kitaev Spin Liquid Candidate OsxCl3 Comprised of Honeycomb Nano-Domains Reviewed

    Kota Kataoka, Daigoro Hirai, Takeshi Yajima, Daisuke Nishio-Hamane, Rieko Ishii, Kwang-Yong Choi, Dirk Wulferding, Peter Lemmens, Shunichiro Kittaka, Toshiro Sakakibara, Hajime Ishikawa, Akira Matsuo, Koichi Kindo, Zenji Hiroi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 89 ( 11 )   2020.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.89.114709

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  28. Single shot x-ray diffractometry in SACLA with pulsed magnetic fields up to 16 T Reviewed

    Akihiko Ikeda, Yasuhiro H. Matsuda, Xuguang Zhou, Takeshi Yajima, Yuya Kubota, Kensuke Tono, Makina Yabashi

    PHYSICAL REVIEW RESEARCH   Vol. 2 ( 4 )   2020.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    DOI： 10.1103/PhysRevResearch.2.043175

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  29. Anisotropic Fully Gapped Superconductivity Possibly Mediated by Charge Fluctuations in a Nondimeric Organic Complex Reviewed

    S. Imajo, H. Akutsu, R. Kurihara, T. Yajima, Y. Kohama, M. Tokunaga, K. Kindo, Y. Nakazawa

    PHYSICAL REVIEW LETTERS   Vol. 125 ( 17 ) page： 177002   2020.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    DOI： 10.1103/PhysRevLett.125.177002

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  30. Spin-orbit-coupled metal candidate PbRe2O6 Reviewed

    Satoshi Tajima, Daigorou Hirai, Takeshi Yajima, Daisuke Nishio-Hamane, Yasuhito Matsubayashi, Zenji Hiroi

    JOURNAL OF SOLID STATE CHEMISTRY   Vol. 288   2020.8

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    DOI： 10.1016/j.jssc.2020.121359

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  31. Anisotropic Triangular Lattice Realized in Rhenium Oxychlorides A(3)ReO(5)Cl(2) (A = Ba, Sr) Reviewed

    Daigorou Hirai, Takeshi Yajima, Kazuhiro Nawa, Mitsuaki Kawamura, Zenji Hiroi

    INORGANIC CHEMISTRY   Vol. 59 ( 14 ) page： 10025 - 10033   2020.7

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    DOI： 10.1021/acs.inorgchem.0c01187

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  32. Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr(4)X(8) (A = Ga, In, X = O, S) Reviewed

    Tomoya Kanematsu, Masaki Mori, Yoshihiko Okamoto, Takeshi Yajima, Koshi Takenaka

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 89 ( 7 )   2020.7

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    DOI： 10.7566/JPSJ.89.073708

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  33. Nonmagnetic Ground States and a Possible Quadrupolar Phase in 4d and 5d Lacunar Spinel Selenides GaM4Se8 (M = Nb, Ta) Reviewed

    Hajime Ishikawa, Takeshi Yajima, Akira Matsuo, Yoshihiko Ihara, Koichi Kindo

    PHYSICAL REVIEW LETTERS   Vol. 124 ( 22 ) page： 227202   2020.6

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    DOI： 10.1103/PhysRevLett.124.227202

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  34. Topochemical anion insertion into one-dimensional Bi channels in Bi2PdO4 Reviewed

    Fumitaka Takeiri, Takeshi Yajima, Saburo Hosokawa, Yoshitaka Matsushita, Hiroshi Kageyama

    JOURNAL OF SOLID STATE CHEMISTRY   Vol. 286   2020.6

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    DOI： 10.1016/j.jssc.2020.121273

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  35. Observation of a Novel Phase Transition in Sr(7)Re(4)O19 Reviewed

    Yutaka Ueda, Mina Murase, Yoshiaki Kobayashi, Masayuki Itoh, Takeshi Yajima, Tomoki Yamaguchi, Ryo Takahashi, Koudai Sugimoto, Yukinori Ohta

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 89 ( 5 )   2020.5

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    DOI： 10.7566/JPSJ.89.054703

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  36. Titanium Hydride Complex BaCa2Ti2H14 with 9-Fold Coordination Reviewed

    Takeshi Yajima, Hotaka Nakajima, Takashi Honda, Kazutaka Ikeda, Toshiya Otomo, Hikaru Takeda, Zenji Hiroi

    INORGANIC CHEMISTRY   Vol. 59 ( 7 ) page： 4228 - 4233   2020.4

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    DOI： 10.1021/acs.inorgchem.9b02810

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  37. Thermal-transport studies of kagome antiferromagnets Reviewed

    Minoru Yamashita, Masatoshi Akazawa, Masaaki Shimozawa, Takasada Shibauchi, Yuji Matsuda, Hajime Ishikawa, Takeshi Yajima, Zenji Hiroi, Migaku Oda, Hiroyuki Yoshida, Hyun-Yong Lee, Jung Hoon Han, Naoki Kawashima

    JOURNAL OF PHYSICS-CONDENSED MATTER   Vol. 32 ( 7 ) page： 074001   2020.2

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    DOI： 10.1088/1361-648X/ab50e9

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  38. Enhanced orbital fluctuations in Mg-doped MnV2O4 single crystals Reviewed

    Qing-Yuan Liu, Zi-Yi Liu, Xue-Bo Zhou, Takeshi Yajima, Yoshiya Uwatoko, Jin-Guang Cheng, Lei Tao, Zhi-Guo Liu, Ming-Xue Huo, Xian-Jie Wang, Yu Sui

    PHYSICAL REVIEW B   Vol. 100 ( 22 )   2019.12

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    DOI： 10.1103/PhysRevB.100.224418

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  39. High magnetic field x-ray diffraction study of the alpha phase of solid oxygen: Absence of giant magnetostriction Reviewed

    Yasuhiro H. Matsuda, Ayumi Shimizu, Akihiko Ikeda, Toshihiro Nomura, Takeshi Yajima, Toshiya Inami, Kohki Takahashi, Tatsuo C. Kobayashi

    PHYSICAL REVIEW B   Vol. 100 ( 21 )   2019.12

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    DOI： 10.1103/PhysRevB.100.214105

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  40. Exploring Structures and Properties through Anion Chemistry

    Kageyama Hiroshi, Yajima Takeshi, Tsujimoto Yoshihiro, Yamamoto Takafumi, Tassel Cedric, Kobayashi Yoji

    Bulletin of the Chemical Society of Japan   Vol. 92 ( 8 ) page： 1349 - 1357   2019.8

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    DOI： 10.1246/bcsj.20190095

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  41. Strongly anisotropic high-temperature Fermi surface of the Kondo semimetal CeNiSn revealed by angle-resolved photoemission spectroscopy Reviewed

    Credric Bareille, T-S Nam, Toshiro Takabatake, Kenta Kuroda, Takeshi Yajima, Mitsuhiro Nakayama, So Kunisada, Shuntaro Akebi, Masato Sakano, Shunsuke Sakuragi, Ryo Noguchi, Byung Il Min, Shik Shin, Takeshi Kondo

    PHYSICAL REVIEW B   Vol. 100 ( 4 )   2019.7

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    DOI： 10.1103/PhysRevB.100.045133

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  42. Weak Anisotropic Lithium-Ion Conductivity in Single Crystals of Li10GeP2S12 Reviewed

    Rui Iwasaki, Satoshi Hori, Ryoji Kanno, Takeshi Yajima, Daigorou Hirai, Yuki Kato, Zenji Hiroi

    CHEMISTRY OF MATERIALS   Vol. 31 ( 10 ) page： 3694 - 3699   2019.5

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    DOI： 10.1021/acs.chemmater.9b00420

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  43. Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite Reviewed

    Akihiko Ikeda, Shunsuke Furukawa, Oleg Janson, Yasuhiro H. Matsuda, Shojiro Takeyama, Takeshi Yajima, Zenji Hiroi, Hajime Ishikawa

    PHYSICAL REVIEW B   Vol. 99 ( 14 )   2019.4

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    DOI： 10.1103/PhysRevB.99.140412

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  44. S=1/2 ferromagnetic Heisenberg chain in a verdazyl-based complex Reviewed

    N. Uemoto, Y. Kono, S. Kittaka, T. Sakakibara, T. Yajima, Y. Iwasaki, S. Miyamoto, Y. Hosokoshi, H. Yamaguchi

    PHYSICAL REVIEW B   Vol. 99 ( 9 )   2019.3

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    DOI： 10.1103/PhysRevB.99.094418

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  45. Anisotropy of Dirac cones and Van Hove singularity in an organic Dirac fermion system Reviewed

    Ayaka Mori, Mitsuyuki Sato, Takeshi Yajima, Takako Konoike, Kazuhito Uchida, Toshihito Osada

    PHYSICAL REVIEW B   Vol. 99 ( 3 )   2019.1

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    DOI： 10.1103/PhysRevB.99.035106

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  46. Nematic transition and highly two-dimensional superconductivity in BaTi2Bi2O revealed by Bi-209-nuclear magnetic resonance/nuclear quadrupole resonance measurements Reviewed

    Shunsaku Kitagawa, Kenji Ishida, Wataru Ishii, Takeshi Yajima, Zenji Hiroi

    PHYSICAL REVIEW B   Vol. 98 ( 22 )   2018.12

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    DOI： 10.1103/PhysRevB.98.220507

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  47. Frustrated Magnetism of Pharmacosiderite Comprising Tetrahedral Clusters Arranged in the Primitive Cubic Lattice Reviewed

    Ryutaro Okuma, Takeshi Yajima, Tatsuo Fujii, Mikio Takano, Zenji Hiroi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 87 ( 9 ) page： 0937021 - 0937024   2018.9

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    DOI： 10.7566/JPSJ.87.093702

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  48. Site Selectivity of Hydride in Early-Transition-Metal Ruddlesden-Popper Oxyhydrides Reviewed

    Olivier J. Hernandez, Gregory Geneste, Takeshi Yajima, Yoji Kobayashi, Masatoshi Okura, Kouhei Aidzu, Cedric Tassel, Serge Paofai, Diptikanta Swain, Clemens Ritter, Hiroshi Kageyama

    INORGANIC CHEMISTRY   Vol. 57 ( 17 ) page： 11058 - 11067   2018.9

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    DOI： 10.1021/acs.inorgchem.8b01645

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  49. Inelastic Neutron Scattering Study of the Spin Dynamics in the Breathing Pyrochlore System LiGa0.95In0.05Cr4O8 Reviewed

    Yu Tanaka, Rafal Wawrzynczak, Manh Duc Le, Tatiana Guidi, Yoshihiko Okamoto, Takeshi Yajima, Zenji Hiroi, Masashi Takigawa, Goran J. Nilsen

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 87 ( 7 )   2018.7

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    DOI： 10.7566/JPSJ.87.073710

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  50. Initial relocation behavior of control rod materials in boiling water reactors studied via time-resolved visualization Reviewed

    Shota Ueda, Byeongnam Jo, Masahiro Kondo, Nejdet Erkan, Takeshi Yajima, Koji Okamoto

    NUCLEAR ENGINEERING AND DESIGN   Vol. 333   page： 99 - 114   2018.7

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    DOI： 10.1016/j.nucengdes.2018.04.006

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  51. Magnetostriction studies up to megagauss fields using fiber Bragg grating technique Reviewed

    Akihiko Ikeda, Yasuhiro H. Matsuda, Daisuke Nakamura, Shojiro Takeyama, Hiroshi Tsuda, Kazuya Nomura, Ayumi Shimizu, Akira Matsuo, Toshihiro Nomura, Tatsuo C. Kobayashi, Takeshi Yajima, Hajime Ishikawa, Zenji Hiroi, Masahiko Isobe, Touru Yamauchi, Keisuke Sato

    2018 16TH INTERNATIONAL CONFERENCE ON MEGAGAUSS MAGNETIC FIELD GENERATION AND RELATED TOPICS (MEGAGAUSS)     page： 98 - 106   2018

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  52. Electronic phase diagram of the titanium oxypnictide superconductor BaTi2(Sb1-xBix)(2)O Reviewed

    Wataru Ishii, Takeshi Yajima, Zenji Hiroi

    28TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT28)   Vol. 969 ( 1 )   2018

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    DOI： 10.1088/1742-6596/969/1/012052

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  53. Suppression of H-/O2- exchange by incorporated nitride anions in the perovskite lattice Reviewed

    Fumitaka Takeiri, Takeshi Yajima, Takafumi Yamamoto, Yoji Kobayashi, Toshiaki Matsui, James Hester, Hiroshi Kageyama

    JOURNAL OF SOLID STATE CHEMISTRY   Vol. 256   page： 33 - 37   2017.12

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    DOI： 10.1016/j.jssc.2017.08.025

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  54. Promoted Hydride/Oxide Exchange in SrTiO3 by Introduction of Anion Vacancy via Aliovalent Cation Substitution Reviewed

    Fumitaka Takeiri, Kohei Aidzu, Takeshi Yajima, Toshiaki Matsui, Takafumi Yamamoto, Yoji Kobayashi, James Hester, Hiroshi Kageyama

    INORGANIC CHEMISTRY   Vol. 56 ( 21 ) page： 13035 - 13040   2017.11

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    DOI： 10.1021/acs.inorgchem.7b01845

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  55. Maximizing T-c by tuning nematicity and magnetism in FeSe1-xSx superconductors Reviewed

    K. Matsuura, Y. Mizukami, Y. Arai, Y. Sugimura, N. Maejima, A. Machida, T. Watanuki, T. Fukuda, T. Yajima, Z. Hiroi, K. Y. Yip, Y. C. Chan, Q. Niu, S. Hosoi, K. Ishida, K. Mukasa, S. Kasahara, J. -G. Cheng, S. K. Goh, Y. Matsuda, Y. Uwatoko, T. Shibauchi

    NATURE COMMUNICATIONS   Vol. 8 ( 1 ) page： 1143   2017.10

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    DOI： 10.1038/s41467-017-01277-x

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  56. Possible Itinerant-Electron Canted Antiferromagnetism in Tetragonal Antiperovskite Cr3AsN Reviewed

    Takeshi Waki, Kenta Takao, Yoshikazu Tabata, Hiroto Ohta, Takeshi Yajima, Zenji Hiroi, Hiroyuki Nakamura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 86 ( 10 )   2017.10

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    DOI： 10.7566/JPSJ.86.104706

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  57. Topochemical Crystal Transformation from a Distorted to a Nearly Perfect Kagome Cuprate Reviewed

    Hajime Ishikawa, Takeshi Yajima, Atsushi Miyake, Masashi Tokunaga, Akira Matsuo, Koichi Kindo, Zenji Hiroi

    CHEMISTRY OF MATERIALS   Vol. 29 ( 16 ) page： 6719 - 6725   2017.8

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    DOI： 10.1021/acs.chemmater.7b01448

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  58. "Visible" 5d Orbital States in a Pleochroic Oxychloride Reviewed

    Daigorou Hirai, Takeshi Yajima, Daisuke Nishio-Hamane, Changsu Kim, Hidefumi Akiyama, Mitsuaki Kawamura, Takahiro Misawa, Nobuyuki Abe, Taka-hisa Arima, Zenji Hiroi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 139 ( 31 ) page： 10784 - 10789   2017.8

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    DOI： 10.1021/jacs.7b05128

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  59. Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagome lattice in CdCu3(OH)(6)(NO3)(2) center dot H2O Reviewed

    Ryutaro Okuma, Takeshi Yajima, Daisuke Nishio-Hamane, Tsuyoshi Okubo, Zenji Hiroi

    PHYSICAL REVIEW B   Vol. 95 ( 9 )   2017.3

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    DOI： 10.1103/PhysRevB.95.094427

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  60. Titanium Pnictide Oxide Superconductors Invited Reviewed

    Takeshi Yajima

    CONDENSED MATTER   Vol. 2 ( 1 ) page： 1 - 21   2017.3

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    DOI： 10.3390/condmat2010004

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  61. J(1)-J(2) square-lattice Heisenberg antiferromagnets with 4d(1) spins: AMoOPO(4)Cl (A = K, Rb) Reviewed

    Hajime Ishikawa, Nanako Nakamura, Makoto Yoshida, Masashi Takigawa, Peter Babkevich, Navid Qureshi, Henrik M. Ronnow, Takeshi Yajima, Zenji Hiroi

    PHYSICAL REVIEW B   Vol. 95 ( 6 )   2017.2

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    DOI： 10.1103/PhysRevB.95.064408

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  62. Selective and low temperature transition metal intercalation in layered tellurides Reviewed

    Takeshi Yajima, Masaki Koshiko, Yaoqing Zhang, Tamio Oguchi, Wen Yu, Daichi Kato, Yoji Kobayashi, Yuki Orikasa, Takafumi Yamamoto, Yoshiharu Uchimoto, Mark A. Green, Hiroshi Kageyama

    NATURE COMMUNICATIONS   Vol. 7   2016.12

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    DOI： 10.1038/ncomms13809

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  63. Emergence of nontrivial magnetic excitations in a spin-liquid state of kagome volborthite Reviewed

    Daiki Watanabe, Kaori Sugii, Masaaki Shimozawa, Yoshitaka Suzuki, Takeshi Yajima, Hajime Ishikawa, Zenji Hiroi, Takasada Shibauchi, Yuji Matsuda, Minoru Yamashita

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   Vol. 113 ( 31 ) page： 8653 - 8657   2016.8

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    DOI： 10.1073/pnas.1524076113

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  64. A labile hydride strategy for the synthesis of heavily nitridized BaTiO3 Reviewed

    Takeshi Yajima, Fumitaka Takeiri, Kohei Aidzu, Hirofumi Akamatsu, Koji Fujita, Wataru Yoshimune, Masatoshi Ohkura, Shiming Lei, Venkatraman Gopalan, Katsuhisa Tanaka, Craig M. Brown, Mark A. Green, Takafumi Yamamoto, Yoji Kobayashi, Hiroshi Kageyama

    NATURE CHEMISTRY   Vol. 7 ( 12 ) page： 1017 - 1023   2015.12

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    DOI： 10.1038/NCHEM.2370

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  65. Electrical Properties of Epitaxial Thin Films of Oxyhydrides ATiO(3-x)H(x) (A = Ba and Sr) Reviewed

    Guillaume Bouilly, Takeshi Yajima, Takahito Terashima, Wataru Yoshimune, Kousuke Nakano, Cedric Tassel, Yoshiro Kususe, Koji Fujita, Katsuhisa Tanaka, Takafumi Yamamoto, Yoji Kobayashi, Hiroshi Kageyama

    CHEMISTRY OF MATERIALS   Vol. 27 ( 18 ) page： 6354 - 6359   2015.9

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    DOI： 10.1021/acs.chemmater.5b02374

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  66. Orbital Arrangements and Magnetic Interactions in the Quasi-One-Dimensional Cuprates ACuMoO(4)(OH) (A = Na, K) Reviewed

    Kazuhiro Nawa, Takeshi Yajima, Yoshihiko Okamoto, Zenji Hiroi

    INORGANIC CHEMISTRY   Vol. 54 ( 11 ) page： 5566 - 5570   2015.6

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    DOI： 10.1021/acs.inorgchem.5b00686

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  67. Superconductivity in 122-type antimonide BaPt2Sb2 Reviewed

    Motoharu Imai, Soshi Ibuka, Naoki Kikugawa, Taichi Terashima, Shinya Uji, Takeshi Yajima, Hiroshi Kageyama, Izumi Hase

    PHYSICAL REVIEW B   Vol. 91 ( 1 )   2015.1

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    DOI： 10.1103/PhysRevB.91.014513

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  68. Superconductivity in LaPd2As2 with a collapsed 122 structure Reviewed

    Subodh Ganesanpotti, Takeshi Yajima, Kousuke Nakano, Yasumasa Nozaki, Takafumi Yamamoto, Cedric Tassel, Yoji Kobayashi, Hiroshi Kageyama

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 613   page： 370 - 374   2014.11

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    DOI： 10.1016/j.jallcom.2014.06.054

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  69. Superconducting properties of BaTi(2)Pn(2)O (Pn = Sb, Bi) Reviewed

    Takeshi Yajima, Kousuke Nakano, Yasumasa Nozaki, Hiroshi Kageyama

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   Vol. 504   page： 36 - 38   2014.9

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    DOI： 10.1016/j.physc.2014.02.018

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  70. Superconductivity in the Hypervalent Compound Ba2Bi(Sb1-xBix)(2) with a Square-Honeycomb Lattice Reviewed

    Takeshi Yajima, Fumitaka Takeiri, Yasumasa Nozaki, Zhi Li, Takami Tohyama, Mark A. Green, Yoji Kobayashi, Hiroshi Kageyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 83 ( 7 )   2014.7

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    DOI： 10.7566/JPSJ.83.073705

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  71. Charge Disproportionation and Magnetoresistivity in a Double Perovskite with Alternate Fe4+(d(4)) and Mn4+(d(3)) Layers Reviewed

    Subodh Ganesanpotti, Cedric Tassel, Naoaki Hayashi, Yoshihiro Goto, Guillaume Bouilly, Takeshi Yajima, Yoji Kobayashi, Hiroshi Kageyama

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   ( 15 ) page： 2576 - 2581   2014.5

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    DOI： 10.1002/ejic.201402009

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  72. LaPd2Sb2: A pnictide superconductor with CaBe2Ge2 type structure Reviewed

    Subodh Ganesanpotti, Takeshi Yajima, Takami Tohyama, Zhi Li, Kousuke Nakano, Yasumasa Nozaki, Cedric Tassel, Yoji Kobayashi, Hiroshi Kageyama

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 583   page： 151 - 154   2014.1

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    DOI： 10.1016/j.jallcom.2013.08.005

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  73. Substrate-induced anion rearrangement in epitaxial thin films of LaSrCoO4-xHx Reviewed

    Guillaume Bouilly, Takeshi Yajima, Takahito Terashima, Yoshiro Kususe, Koji Fujita, Cedric Tassel, Takafumi Yamamoto, Katsuhisa Tanaka, Yoji Kobayashi, Hiroshi Kageyama

    CRYSTENGCOMM   Vol. 16 ( 41 ) page： 9669 - 9674   2014

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    DOI： 10.1039/c4ce01268b

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  74. Muon spin relaxation and electron/neutron diffraction studies of BaTi2(As1-xSbx)(2)O: Absence of static magnetism and superlattice reflections Reviewed

    Y. Nozaki, K. Nakano, T. Yajima, H. Kageyama, B. Frandsen, L. Liu, S. Cheung, T. Goko, Y. J. Uemura, T. S. J. Munsie, T. Medina, G. M. Luke, J. Munevar, D. Nishio-Hamane, C. M. Brown

    PHYSICAL REVIEW B   Vol. 88 ( 21 )   2013.12

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    DOI： 10.1103/PhysRevB.88.214506

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  75. A-Site-Ordered Perovskite MnCu3V4O12 with a 12-Coordinated Manganese(II) Reviewed

    Yasuhide Akizuki, Ikuya Yamada, Koji Fujita, Norimasa Nishiyama, Tetuo Irifune, Takeshi Yajima, Hiroshi Kageyama, Katsuhisa Tanaka

    INORGANIC CHEMISTRY   Vol. 52 ( 19 ) page： 11538 - 11543   2013.10

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    DOI： 10.1021/ic401855j

    Web of Science

  76. Hierarchically Porous Monoliths Based on N-Doped Reduced Titanium Oxides and Their Electric and Electrochemical Properties Reviewed

    George Hasegawa, Tatsuya Sato, Kazuyoshi Kanamori, Kousuke Nakano, Takeshi Yajima, Yoji Kobayashi, Hiroshi Kageyama, Takeshi Abe, Kazuki Nakanishi

    CHEMISTRY OF MATERIALS   Vol. 25 ( 17 ) page： 3504 - 3512   2013.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    DOI： 10.1021/cm401933a

    Web of Science

  77. Molecular Rotors of Coronene in Charge-Transfer Solids Reviewed

    Yukihiro Yoshida, Yasuhiro Shimizu, Takeshi Yajima, Goro Maruta, Sadamu Takeda, Yoshiaki Nakano, Takaaki Hiramatsu, Hiroshi Kageyama, Hideki Yamochi, Gunzi Saito

    CHEMISTRY-A EUROPEAN JOURNAL   Vol. 19 ( 37 ) page： 12313 - 12324   2013.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-V C H VERLAG GMBH  

    DOI： 10.1002/chem.201300578

    Web of Science

  78. T-c Enhancement by Aliovalent Anionic Substitution in Superconducting BaTi2(Sb1-xSnx)(2)O Reviewed

    Kousuke Nakano, Takeshi Yajima, Fumitaka Takeiri, Mark A. Green, James Hester, Yoji Kobayashi, Hiroshi Kageyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 82 ( 7 )   2013.7

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.82.074707

    Web of Science

  79. Two Superconducting Phases in the Isovalent Solid Solutions BaTi(2)Pn(2)O (Pn = As, Sb, and Bi) Reviewed

    Takeshi Yajima, Kousuke Nakano, Fumitaka Takeiri, Yasumasa Nozaki, Yoji Kobayashi, Hiroshi Kageyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 82 ( 3 )   2013.3

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.82.033705

    Web of Science

  80. s-wave superconductivity in superconducting BaTi2Sb2O revealed by Sb-121/123-NMR/nuclear quadrupole resonance measurements Reviewed

    S. Kitagawa, K. Ishida, K. Nakano, T. Yajima, H. Kageyama

    PHYSICAL REVIEW B   Vol. 87 ( 6 )   2013.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    DOI： 10.1103/PhysRevB.87.060510

    Web of Science

  81. Copper(II) solvatochromic complexes [Cu(acac)((NN)-N-boolean AND)(ligand)BPh4 with various axial ligands. Correlation between coordination geometries and d-d transition energies (acac = acetylacetonato, (NN)-N-boolean AND=1,10-phenanthoroline, 2,2 '-bipyridyl) Reviewed

    Ryo Horikoshi, Yusuke Funasako, Takeshi Yajima, Tomoyuki Mochida, Yoji Kobayashi, Hiroshi Kageyama

    POLYHEDRON   Vol. 50 ( 1 ) page： 66 - 74   2013.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

    DOI： 10.1016/j.poly.2012.09.063

    Web of Science

  82. Synthesis and Physical Properties of the New Oxybismuthides BaTi2Bi2O and (SrF)(2)Ti2Bi2O with a d(1) Square Net Reviewed

    Takeshi Yajima, Kousuke Nakano, Fumitaka Takeiri, James Hester, Takafumi Yamamoto, Yoji Kobayashi, Naruki Tsuji, Jungeun Kim, Akihiko Fujiwara, Hiroshi Kageyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 82 ( 1 )   2013.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.7566/JPSJ.82.013703

    Web of Science

  83. Oxyhydrides of (Ca,Sr,Ba)TiO3 Perovskite Solid Solutions Reviewed

    Tatsunori Sakaguchi, Yoji Kobayashi, Takeshi Yajima, Masatoshi Ohkura, Cedric Tassel, Fumitaka Takeiri, Shingo Mitsuoka, Hiroshi Ohkubo, Takafumi Yamamoto, Jung Eun Kim, Naruki Tsuji, Akihiko Fujihara, Yoshitaka Matsushita, James Hester, Maxim Avdeev, Kenji Ohoyama, Hiroshi Kageyama

    INORGANIC CHEMISTRY   Vol. 51 ( 21 ) page： 11371 - 11376   2012.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    DOI： 10.1021/ic300859n

    Web of Science

  84. Superconductivity in BaTi2Sb2O with a d(1) Square Lattice Reviewed

    Takeshi Yajima, Kousuke Nakano, Fumitaka Takeiri, Toshio Ono, Yuko Hosokoshi, Yoshitaka Matsushita, James Hester, Yoji Kobayashi, Hiroshi Kageyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 81 ( 10 )   2012.10

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    DOI： 10.1143/JPSJ.81.103706

    Web of Science

  85. An oxyhydride of BaTiO3 exhibiting hydride exchange and electronic conductivity Reviewed

    Yoji Kobayashi, Olivier J. Hernandez, Tatsunori Sakaguchi, Takeshi Yajima, Thierry Roisnel, Yoshihiro Tsujimoto, Masaki Morita, Yasuto Noda, Yuuki Mogami, Atsushi Kitada, Masatoshi Ohkura, Saburo Hosokawa, Zhaofei Li, Katsuro Hayashi, Yoshihiro Kusano, Jung Eun Kim, Naruki Tsuji, Akihiko Fujiwara, Yoshitaka Matsushita, Kazuyoshi Yoshimura, Kiyonori Takegoshi, Masashi Inoue, Mikio Takano, Hiroshi Kageyama

    NATURE MATERIALS   Vol. 11 ( 6 ) page： 507 - 511   2012.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATURE PUBLISHING GROUP  

    DOI： 10.1038/NMAT3302

    Web of Science

    Scopus

  86. Epitaxial Thin Films of ATiO(3-x)H(x) (A = Ba, Sr, Ca) with Metallic Conductivity Reviewed

    Takeshi Yajima, Atsushi Kitada, Yoji Kobayashi, Tatsunori Sakaguchi, Guillaume. Bouilly, Shigeru Kasahara, Takahito Terashima, Mikio Takano, Hiroshi Kageyama

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 134 ( 21 ) page： 8782 - 8785   2012.5

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    DOI： 10.1021/ja302465c

    Web of Science

  87. Two-dimensional Frustrated Antiferromagnets (MCl)LaNb2O7 (M = Mn, Co, Cr) Reviewed

    A. Kitada, Y. Tsujimoto, T. Yajima, K. Yoshimura, Y. Ajiro, Y. Kobayashi, H. Kageyama

    INTERNATIONAL CONFERENCE ON FRUSTRATION IN CONDENSED MATTER (ICFCM)   Vol. 320   2011

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IOP PUBLISHING LTD  

    DOI： 10.1088/1742-6596/320/1/012035

    Web of Science

  88. Spatial Redistribution of Oxygen Ions in Oxide Resistance Switching Device after Forming Process Reviewed

    Takeshi Yajima, Kohei Fujiwara, Aiko Nakao, Tomohiro Kobayashi, Toshiyuki Tanaka, Kei Sunouchi, Yoshiaki Suzuki, Mai Takeda, Kentaro Kojima, Yoshinobu Nakamura, Kouji Taniguchi, Hidenori Takagi

    JAPANESE JOURNAL OF APPLIED PHYSICS   Vol. 49 ( 6 ) page： 0602151 - 0602153   2010.6

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOC APPLIED PHYSICS  

    DOI： 10.1143/JJAP.49.060215

    Web of Science

    Scopus

  89. Electrode-Geometry Control of the Formation of a Conductive Bridge in Oxide Resistance Switching Devices Reviewed

    Kohei Fujiwara, Takeshi Yajima, Yoshinobu Nakamura, Marcelo J. Rozenberg, Hidenori Takagi

    APPLIED PHYSICS EXPRESS   Vol. 2 ( 8 )   2009.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOCIETY APPLIED PHYSICS  

    DOI： 10.1143/APEX.2.081401

    Web of Science

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To the head of Papers.▲

Presentations 20

  1. Ionic Correlation and Li-Ion Migration in Superionic Conductors Invited International conference

    Takeshi Yajima

    The Fourteenth International Conference on the Science and Technology for Advanced Ceramics (STAC-14)  2024.10.9 

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    Event date： 2024.10

    Language：English   Presentation type：Oral presentation (invited, special)  

  2. Li Concentration Change Around Cu/Lipon Interface Measured By Time of Flight Elastic Recoil Detection Analysis International conference

    Kyoshi Kurihara, Shuri Nakamizo, Satoshi Yamamoto, Keisuke Yasuda, Takuya Majima, Takeshi Yajima, Yasutoshi Iriyama

    PRiME 2024  2024.10.8 

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    Event date： 2024.10

    Language：English   Presentation type：Poster presentation  

  3. Transition-Metal Substitution Effects on Ionic Conduction Properties of Solid Electrolyte LiTa2PO8 International conference

    Souichi Shima, Takeshi Yajima, Yasutoshi Iriyama

    PRiME 2024  2024.10.8 

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    Event date： 2024.10

    Language：English   Presentation type：Poster presentation  

  4. アニオンの特性や組み合わせに基づいた新物質開発 Invited

    矢島 健

    日本金属学会2024年秋期講演大会  2024.9.19 

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (keynote)  

  5. フラックス法による固体電解質単結晶の育成とイオン伝導機構の解明 Invited

    矢島 健

    日本セラミックス協会 第37回秋季シンポジウム  2024.9.10 

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

  6. 超イオン伝導体におけるイオン相関とイオン伝導の関係解明

    矢島 健

    2024旭硝子財団 助成研究発表会  2024.7.30 

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    Event date： 2024.7

    Language：Japanese   Presentation type：Poster presentation  

  7. 超イオン伝導体Li10GeP2S12におけるLiイオンの相関と渋滞

    矢島 健

    「イオン渋滞学」第1回領域会議  2024.5.31 

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    Event date： 2024.5 - 2024.6

    Language：Japanese   Presentation type：Poster presentation  

  8. イオン伝導体におけるイオン相関

    矢島 健

    「イオン渋滞学」第1回領域会議  2024.6.1 

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    Event date： 2024.5 - 2024.6

    Language：Japanese   Presentation type：Oral presentation (general)  

  9. 硫化物系全固体薄膜電池の有限要素解析

    上野　将紀，鈴木　康広，加藤　雄，石垣　範和，矢島　健，入山　恭寿

    「蓄電固体界面科学」第10回領域会議  2024.1.10 

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    Event date： 2024.1

    Language：Japanese   Presentation type：Poster presentation  

  10. 電圧印加冷却スパッタリング法によるLiCoO2/LiPONの低抵抗界面構築

    丸野　守啓，中山　楓太，鈴木　康広，坂倉　美雪，大西　剛，矢島　健，入山　恭寿

    「蓄電固体界面科学」第10回領域会議  2024.1.10 

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    Event date： 2024.1

    Language：Japanese   Presentation type：Poster presentation  

  11. 酸化物固体電解質LiTa2PO8のイオン伝導特性に対する元素置換効果

    島　颯一，浜田　実久，石垣　範和，矢島　健，入山　恭寿

    「蓄電固体界面科学」第10回領域会議  2024.1.10 

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    Event date： 2024.1

    Language：Japanese   Presentation type：Poster presentation  

  12. 複合アニオン型リチウムイオン伝導体の探索

    越田　耕平，矢島　健，入山　恭寿

    「蓄電固体界面科学」第10回領域会議  2024.1.10 

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    Event date： 2024.1

    Language：Japanese   Presentation type：Poster presentation  

  13. 電極/LiPON界面で起こるLiPONの還元反応機構の解明

    栗原　匡志，山本　智士，中溝　珠里，矢島　健，間嶋　拓也，安田　啓介，入山　恭寿

    「蓄電固体界面科学」第10回領域会議  2024.1.10 

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    Event date： 2024.1

    Language：Japanese   Presentation type：Poster presentation  

  14. 電圧印加冷却スパッタリング法によるLiCoO2/LiPONの低抵抗界面構築

    中山　楓太，丸野　守啓，鈴木　康広，矢島　健，入山　恭寿

    第64回 電池討論会  2023.11.30 

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    Event date： 2023.11

    Language：Japanese   Presentation type：Oral presentation (general)  

  15. Li6.6La3Zr1.6Ta0.4O12固体電解質上で起こるLi析出溶解反応に及ぼす静水圧の影響

    黒瀬 凌生、本山 宗主、BenoÎt D. L. Campéon、宇賀田 洋介、石垣 範和、矢島 健、藪内 直明、入山 恭寿

    第54回中部化学関係学協会支部連合秋季大会  2023.11.12  中部化学関係学協会支部連合協議会

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    Event date： 2023.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：三重大学工学部  

  16. 前躯体を用いた酸化物固体電解質LiTa2PO8の合成と評価

    浜田　実久、石垣、島　颯一、矢島　健、入山　恭寿

    第32回無機リン化学討論会  2023.9.21  日本無機リン化学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：熊本大学  

  17. 電圧印加冷却スパッタリング法による電極／固体電解質の低抵抗界面構築

    丸野　守啓、中山　楓太、鈴木　康広、矢島　健、入山　恭寿

    2023電気化学秋季大会  2023.9.12  電気化学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡県福岡市  

  18. 電気化学X線光電子分光法を用いたLi-Nb-O被覆層の電圧依存計測

    加藤　雄、吉川　慶佑、鈴木　康広、矢島　健、入山　恭寿

    2023電気化学秋季大会  2023.9.12  電気化学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡県福岡市  

  19. 電極/LiPON界面で起こる還元反応機構の解明

    K. Kurihara, S. Yamamoto, S. Nakamizo, T. Yajima, T. Majima, K. Yasuda, Y. Iriyama

    第17回 固体イオニクスセミナー・「蓄電固体界面科学」第5回若手勉強会  2023.8.7 

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    Event date： 2023.8

    Language：Japanese   Presentation type：Poster presentation  

  20. Correlated Lithium-Ion Migration in Solid Electrolyte Li10GeP2S12 International conference

    T. Yajima, Y. Hinuma, S. Hori, R. Iwasaki, R. Kanno, T. Ohhara, A. Nakao, K. Munakata, Z. Hiroi

    ICMAT2023  2023.6.27 

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    Event date： 2023.6

    Language：English   Presentation type：Poster presentation  

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To the head of Presentations.▲

KAKENHI (Grants-in-Aid for Scientific Research) 6

  1. Creation of Novel Materials and Functions based on Ion Jamology

    Grant number：24H02204  2024.4 - 2029.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (A)

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    Authorship：Coinvestigator(s) 

  2. 反強磁性巨大磁歪材料の創製

    Grant number：23H01831  2023.4 - 2026.3

    科学研究費助成事業  基盤研究(B)

    岡本 佳比古, 矢島 健

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    Authorship：Coinvestigator(s) 

  3. 反強磁性巨大磁歪材料の創製

    Grant number：23K26524  2023.4 - 2026.3

    科学研究費助成事業  基盤研究(B)

    岡本 佳比古, 矢島 健

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    Authorship：Coinvestigator(s) 

    反強磁性体に着目した新材料探索により、巨大な磁場誘起歪を示す新材料を開発する。磁場中で物体の形状や大きさが変化する現象は磁歪（磁場誘起歪）と呼ばれる。その開拓には長い歴史があるが、一方、現状では反強磁性体における磁場誘起歪現象はほとんど未開拓といえる。室温付近で磁気秩序を示すクロム化合物反強磁性体や強いスピン軌道結合が働く幾何学的フラストレート磁性体に着目し網羅的な材料探索を行うことで、巨大な磁場誘起歪を示す新材料の開拓に挑む。これにより、磁歪材料＝強磁性体という常識を覆し材料探索の幅を広げ、磁歪のより広範な実用に繋がる次世代の実用材料候補を提示することを目指す。

  4. Elucidation of ionic correlation in superionic conductors using single crystals

    Grant number：21K04636  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Authorship：Principal investigator 

    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

  5. Exploring Novel Mixed Anion Compounds Based on Hydride Chemistry

    Grant number：18K04693  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Yajima Takeshi

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    Authorship：Principal investigator 

    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

  6. Superconductivity in mixed anionic compounds and exploring of its related materials

    Grant number：15K17698  2015.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    YAJIMA Takeshi

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    Authorship：Principal investigator 

    Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）

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To the head of KAKENHI (Grants-in-Aid for Scientific Research).▲
 

Teaching Experience (On-campus) 13

  1. First Year Seminar

    2023

  2. Seminars on Nanostructure Design 2E

    2023

  3. Seminars on Nanostructure Design 2C

    2023

  4. Seminars on Nanostructure Design 2A

    2023

  5. Advanced Experiments and Exercises on Nanostructure Design 2

    2023

  6. Advanced Experiments and Exercises on Nanostructure Design 1

    2023

  7. Seminars on Nanostructure Design 1C

    2023

  8. Seminars on Nanostructure Design 1A

    2023

  9. Seminars on Nanostructure Design 2D

    2023

  10. Seminars on Nanostructure Design 2B

    2023

  11. Seminars on Nanostructure Design 1D

    2023

  12. Seminars on Nanostructure Design 1B

    2023

  13. Basics of Diffusion in Solids

    2023

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To the head of Teaching Experience (On-campus).▲