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Updated on 2025/03/23
Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry
Nagoya University Graduate School of Engineering Materials Design Innovation Engineering 3 Associate professor
2023.4
Nagoya University School of Engineering Materials Science and Engineering Associate professor
2023.4
The University of Tokyo ISSP, Materials Design and Characterization Laboratory Assistant Professor
2013.7 - 2023.3
Kyoto University
2012.12 - 2013.6
Kyoto University
2010.4 - 2012.11
The University of Tokyo
- 2010.3
The University of Tokyo
- 2007.3
The University of Tokyo
- 2005.3
電気化学会
日本物理学会
応用物理学会
日本セラミックス協会
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
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
Structural and Li-Ion Conduction Properties of Ti-and W-Substituted LiTa<inf>2</inf>PO<inf>8</inf>
Shima S., Yajima T., Ishigaki N., Iriyama Y.
Chemistry of Materials Vol. 37 ( 3 ) page： 1215 - 1220 2025.2
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Publisher：Chemistry of Materials
Li+-conductive oxide solid electrolytes (SEs) are chemically stable and could potentially lead to safer all-solid-state batteries. However, practical applications of oxide SEs are limited in the current stage, and one of the crucial problems arises from 1 or 2 orders lower ionic conductivity of oxide SEs than sulfide and chloride SEs. Among the various oxide SEs, LiTa2PO8 exhibits a high Li+ conductivity of 2.5 × 10-1 mS cm-1 at room temperature. Because most high Li+ conductive oxide SEs such as Li7-xLa3Zr2-xNbxO12 and Li1+xAlxTi2-x(PO4)3 have been achieved by chemical substitutions from parent compounds (Li7La3Zr2O12 and LiTi2(PO4)3), chemical substitutions for LiTa2PO8 will be an effective way for further increasing Li+ conductivity. Here, we synthesized single-phase Ti-and W-substituted LiTa2PO8 and investigated their Li+ conductivities. Both of these substitutions decreased unit cell volume. Ti-substitutions decreased activation energy for Li+ conduction in the bulk (Ea) and almost doubled both the total Li+ conductivity (σtotal) and bulk Li+ conductivity (σbulk) W-substitutions also decreased Ea, but both the σtotal and the σbulk slightly decreased. The calculated Ea of σbulk by bond valence energy assuming single-ion hopping increased in both substitutions due to their smaller unit cell volume. On the other hand, experimentally obtained Ea decreased for both substitutions. This discrepancy may arise from the ionic correlation of the Li+ ion in LiTa2PO8, providing further insight into enhancing the ionic conductivity.
Electrochemical lithium-ion insertion/extraction reactions of multilayered graphene with random twist angles Open Access
Yamamoto S., Sakakibara R., Shima S., Matsuura S., Yajima T., Motoyama M., Norimatsu W., Kimura Y., Amezawa K., Iriyama Y.
Chemical Communications Vol. 60 ( 99 ) page： 14790 - 14793 2024.11
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Language：English Publisher：Chemical Communications
A multilayer graphene film with random twist angles between layers (TAGr) on SiC(0001̄) shows six pairs of redox peaks for Li+ insertion/extraction reaction. The distributed twisted angle in TAGr regulates Li+ insertion sites, and smaller c-axis expansion (3%) is realized by Li+ insertion.
DOI： 10.1039/d4cc04441j
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.
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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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.)
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
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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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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<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
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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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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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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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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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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DOI： 10.1063/5.0134911
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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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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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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DOI： 10.1063/5.0097298
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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DOI： 10.1063/5.0088134
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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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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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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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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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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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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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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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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DOI： 10.1039/d1ta00552a
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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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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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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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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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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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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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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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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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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Hajime Ishikawa, Takeshi Yajima, Akira Matsuo, Yoshihiko Ihara, Koichi Kindo
PHYSICAL REVIEW LETTERS Vol. 124 ( 22 ) page： 227202 2020.6
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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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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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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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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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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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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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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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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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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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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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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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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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Shunsaku Kitagawa, Kenji Ishida, Wataru Ishii, Takeshi Yajima, Zenji Hiroi
PHYSICAL REVIEW B Vol. 98 ( 22 ) 2018.12
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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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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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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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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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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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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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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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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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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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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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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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"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
Ryutaro Okuma, Takeshi Yajima, Daisuke Nishio-Hamane, Tsuyoshi Okubo, Zenji Hiroi
PHYSICAL REVIEW B Vol. 95 ( 9 ) 2017.3
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Titanium Pnictide Oxide Superconductors Invited Reviewed
Takeshi Yajima
CONDENSED MATTER Vol. 2 ( 1 ) page： 1 - 21 2017.3
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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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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
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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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
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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Kazuhiro Nawa, Takeshi Yajima, Yoshihiko Okamoto, Zenji Hiroi
INORGANIC CHEMISTRY Vol. 54 ( 11 ) page： 5566 - 5570 2015.6
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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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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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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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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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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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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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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
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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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
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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DOI： 10.1021/cm401933a
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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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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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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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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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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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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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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DOI： 10.1021/ic300859n
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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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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DOI： 10.1038/NMAT3302
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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DOI： 10.1021/ja302465c
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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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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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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固体電解質LiTa2PO8のイオン伝導特性に対する遷移金属元素置換効果
島 颯一, 矢島 健, 石垣 範和, 入山 恭寿
GteX酸化物TM全体会議
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Event date： 2025.3
Presentation type：Poster presentation
超イオン伝導におけるイオン相関現象 Invited
矢島 健
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Oral presentation (invited, special)
分子アニオンを含有するLiイオン伝導体の探索
山下 拓真, 矢島 健, 越田 耕平, 入山 恭寿
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Poster presentation
LiBH4アニオン置換体のイオン伝導特性に対するアニオンサイズ依存性
市田 輝, 矢島 健, 越田 耕平, 入山 恭寿
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Poster presentation
高イオン電導性を示す酸ハロゲン化物固体電解質の探索
松浦 信介, 矢島 健, 入山 恭寿
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Poster presentation
超イオン伝導体LIi1+xAlxTi2-x(PO4)3単結晶のイオン電導特性
佐藤 大介, 矢島 健, 藤原 靖幸, 入山 恭寿
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Poster presentation
元素置換がもたらす超イオン伝導体LiTa2PO8のイオン伝導特性への影響
島 颯一, 矢島 健, 石垣 範和, 入山 恭寿
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Poster presentation
Liイオン伝導体LiBH4に対するアニオン置換とイオン伝導特性評価
越田 耕平, 矢島 健, 入山 恭寿
ARG講演会/第102回若手講演会/第5回研究会（複合開催）
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Event date： 2025.1
Presentation type：Poster presentation
LiBH4に対するアニオン置換とイオン伝導特性評価
越田 耕平， 矢島 健， 入山 恭寿
2024年度日本セラミックス協会東海支部学術研究発表会
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Event date： 2024.12
Presentation type：Oral presentation (general)
固体電解質LiTa2PO8のイオン伝導特性に対する遷移金属元素置換効果
島 颯一， 矢島 健， 石垣 範和， 入山 恭寿
2024年度日本セラミックス協会東海支部学術研究発表会
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Event date： 2024.12
Presentation type：Oral presentation (general)
LiCoO2/LiPONの超低抵抗界面形成におけるLiPON組成の影響
丸野 守啓，鈴木 康広，大西 剛， 野村 優貴，山本 和生，矢島 健， 入山 恭寿
第65回 電池討論会
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Event date： 2024.11
Presentation type：Oral presentation (general)
硫化物型全固体電池の充電過程でおこる酸素放出と高エネルギー密度化への対策
吉川 慶佑，加藤 雄，鈴木 康広，塩田 彰宏，大西 剛，雨澤 浩史，中尾 愛子，矢島 健，入山 恭寿
第65回 電池討論会
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Event date： 2024.11
Presentation type：Oral presentation (general)
Li Concentration Change Around Cu/Lipon Interface Measured By Time of Flight Elastic Recoil Detection Analysis
K. Kurihara, S. Nakamizo, S. Yamamoto, K. Yasuda, T. Majima, T. Yajima, and Y. Iriyama
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Event date： 2024.10
Language：English Presentation type：Poster presentation
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)
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
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
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)
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)
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
硫化物固体電解質の被覆層劣化機構の解明
杉山 蒼， 入山 恭寿， 吉川 慶佑， 加藤 雄， 矢島 健， 中尾 愛子
2024年度 立命館大学SRセンター研究成果報告会
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Event date： 2024.6
Presentation type：Poster presentation
固体電解質LiTa2PO8のイオン伝導特性に対する遷移金属元素置換効果
島 颯一， 矢島 健， 石垣 範和， 入山 恭寿
第25回化学電池材料研究会ミーティング
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Event date： 2024.6
Language：Japanese Presentation type：Oral presentation (general)
TOF-ERDAによるCu/LiPON界面におけるLi濃度変化の測定
栗原 匡志， 中溝 珠里， 山本 智士， 安田 啓介， 間嶋 拓也， 矢島 健， 入山 恭寿
第25回化学電池材料研究会ミーティング
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Event date： 2024.6
Language：Japanese Presentation type：Oral presentation (general)
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
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)
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
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
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
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
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
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)
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
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
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
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
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
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
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)
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)
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。
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 ）
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 ）
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 ）
First Year Seminar
2023
Seminars on Nanostructure Design 2E
2023
Seminars on Nanostructure Design 2C
2023
Seminars on Nanostructure Design 2A
2023
Advanced Experiments and Exercises on Nanostructure Design 2
2023
Advanced Experiments and Exercises on Nanostructure Design 1
2023
Seminars on Nanostructure Design 1C
2023
Seminars on Nanostructure Design 1A
2023
Seminars on Nanostructure Design 2D
2023
Seminars on Nanostructure Design 2B
2023
Seminars on Nanostructure Design 1D
2023
Seminars on Nanostructure Design 1B
2023
Basics of Diffusion in Solids
2023
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