Effect of Non-Stoichiometry on Magnetocaloric Properties of HoB2 Gas-Atomized Particles 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Hiroyuki Takeya, Pedro Baptista de Castro, Akiko T. Saito, Kensei Terashima, Takenori Numazawa, Yoshihiko Takano

IEEE Transactions on Magnetics   58 巻 ( 6 )   2022年4月

Magnetocaloric particles of the Laves phase compound HoAl2 prepared by electrode induction melting gas atomization 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Hiroyuki Takeya, Akiko T. Saito, Kensei Terashima, Takenori Numazawa, Yoshihiko Takano

Journal of Magnetism and Magnetic Materials   547 巻 ( 168906 )   2022年4月

Al substitution effect on magnetic properties of magnetocaloric material HoB2 査読有り 国際誌

S. Iwasaki, T. D. Yamamoto, P. B. Castro, K. Terashima, H. Takeya, Y. Takano

Solid State Communications   342 巻 ( 114616 )   2022年2月

Gas-atomized particles of giant magnetocaloric compound HoB2 for magnetic hydrogen liquefiers 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Hiroyuki Takeya, Akiko T. Saito, Kensei Terashima, Pedro Baptista de Castro, Takenori Numazawa, Yoshihiko Takano

Applied Physics A: Materials Science & Processing   127 巻 ( 4 ) 頁： 301   2021年4月

Adiabatic temperature change in ErAl2/metal PIT wires: A practical method for estimating the magnetocaloric response of magnetocaloric composites 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Hiroyuki Takeya, Akiko T. Saito, Kensei Terashima, Takenori Numazawa, Yoshihiko Takano

Journal of Magnetism and Magnetic Materials   513 巻 ( 167207 )   2020年11月

Magnetic entropy change of ErAl2 magnetocaloric wires fabricated by a powder-in-tube method 査読有り 国際誌 Open Access

Takafumi D Yamamoto, Hiroyuki Takeya, Suguru Iwasaki, Kensei Terashima, Pedro Baptista de Castro, Takenori Numazawa and Yoshihiko Takano

Journal of Physics D: Applied Physics   53 巻 ( 9 ) 頁： 095004   2019年12月

常磁性物質CaRuO3における局所歪みがもたらす強磁性クラスターの直接観測 査読有り

山本 貴史, 戸田 康介, 寺崎 一郎

SPring-8/SACLA 利用研究成果集   7 巻 ( 2 ) 頁： 212 - 215   2019年8月

Dynamical coupling of dilute magnetic impurities with quantum spin liquid state in the S=3/2 dimer compound Ba3ZnRu2O9 査読有り 国際誌 Open Access

Takafumi D Yamamoto, Hiroki Taniguchi and Ichiro Terasaki

Journal of Physics: Condensed Matter   30 巻 ( 35 ) 頁： 355801   2018年8月

Magneto-thermopower in the Weak Ferromagnetic Oxide CaRu0.8Sc0.2O3: An Experimental Test for the Kelvin Formula in a Magnetic Material 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Hiroki Taniguchi, Yukio Yasui, Satoshi Iguchi, Takahiko Sasaki, Ichiro Terasaki

Journal of the Physical Society of Japan   86 巻 ( 10 ) 頁： 104707   2017年9月

Ferromagnetic Cluster Glass Phase Embedded in a Paramagnetic and Metallic Host in Non-Uniform Magnetic System CaRu1-xScxO3 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Atsuhiro Kotani, Hiroshi Nakajima, Ryuji Okazaki, Hiroki Taniguchi, Shigeo Mori, Ichiro Terasaki

Journal of the Physical Society of Japan   85 巻 ( 3 ) 頁： 034711   2016年2月

Non-uniform Magnetic System Driven by Non-magnetic Ion Substitution in CaRu1-xScxO3: Two-Component Analysis 査読有り 国際誌 Open Access

Takafumi D. Yamamoto, Ryuji Okazaki, Hiroki Taniguchi, Ichiro Terasaki

Journal of the Physical Society of Japan   84 巻 ( 1 ) 頁： 014708   2014年12月

Interplay among spin, orbital, and lattice degrees of freedom in the magnetocaloric compound HoB2 査読有り 国際誌

Noriki Terada, Simon R. Larsen, Takafumi D. Yamamoto, Daisuke Okuyama, Hironori Nakao, Ginga Kitahara, Shuki Torii, Hiraku Saito, Taro Nakajima, Osamu Sakai, Hiroaki Mamiya, Kensei Terashima, Hiroyuki Takeya, Yoshihiko Takano, Hideaki Kitazawa

Physical Review B   113 巻 ( 22 )   2026年6月

Design Principles of Magnetism in Tsai-Type Hypermaterials: Long-Range Magnetic Order in Quasicrystals and Approximant Crystals 査読有り 国際誌 Open Access

Farid Labib, Takafumi D. Yamamoto, Asuka Ishikawa, Ryuji Tamura

MATERIALS TRANSACTIONS   67 巻 ( 5 ) 頁： 574 - 591   2026年4月

Valence Electronic States of Magnetic Au-Al-Tb Quasicrystal Approximants Studied by Soft and Hard X-ray Electron Spectroscopies 査読有り 国際誌 Open Access

Goro Nozue, Hidenori Fujiwara, Satoru Hamamoto, Mai Sakaguchi, Yuto Torii, Takuya D. Nakamura, Nonoka U. Sakamoto, Takayuki Kiss, Masaki Oura, Kojiro Mimura, Kotaro Higashi, Naomi Kawamura, Arata Tanaka, Asuka Ishikawa, Takafumi D. Yamamoto, Ryuji Tamura, Akira Sekiyama

MATERIALS TRANSACTIONS   67 巻 ( 5 ) 頁： 631 - 637   2026年4月

Orbital-Dependent Pseudogap Structure of an Al-Pd-Ru Quasicrystal Probed by X-ray Absorption and Core-Level Photoemission Spectroscopy 査読有り 国際誌 Open Access

Nonoka U. Sakamoto, Hidenori Fujiwara, Takuya D. Nakamura, Kenshin Okazaki, Goro Nozue, Takayuki Kiss, Yasumasa Takagi, Souta Tanaka, Yutaka Iwasaki, Yasuhiro Niwa, Asuka Ishikawa, Takafumi D. Yamamoto, Ryuji Tamura, Akira Yasui, Kiyofumi Nitta, Satoru Hamamoto, Masaki Oura, Akira Sekiyama

MATERIALS TRANSACTIONS   67 巻 ( 5 ) 頁： 626 - 630   2026年4月

Enhancing hydrogen permeation barrier performance of ErCo2 magnetic refrigeration materials via surface oxide layer formation 査読有り 国際誌 Open Access

Y. Xu, K. Oyoshi, H. Yoshikawa, H. Takeya, H. Amekura, T. D. Yamamoto, Y. Matsushita, A. A. Belik, M. Tanaka, A. T. Saito, K. Kamiya, Y. Takeda

Nature Communications   17 巻 ( 4952 )   2026年4月

Pressure-induced anomalous enhancement in the superconducting critical temperature of the transition metal chalcogenides Ta2PdS6 and Ta2PdSe6 査読有り 国際誌

Ryo Matsumoto, Akitoshi Nakano, Takafumi D. Yamamoto, Kensei Terashima, Kazuki Yamane, Masahiro Ohkuma, Ichiro Terasaki, Yoshihiko Takano

Physical Review B   112 巻 ( 9 )   2025年9月

Crystal Structure and Physical Properties of Au4Al-Type Suboxides in the Ti–Rh–Si–O and Ti–Ir–Si–O Systems 査読有り 国際誌 Open Access

Zhijun Li, Xun Kang, Xuan Liang, Alexei A. Belik, Masao Arai, Kazunari Yamaura, Rintaro Oshikiri, Asuka Ishikawa, Takafumi D. Yamamoto, Shintaro Suzuki, Ryuji Tamura

INORGANIC CHEMISTRY   64 巻 ( 10 ) 頁： 5004 - 5013   2025年3月

High-pressure effects on the crystal structure and critical temperature in superconducting NbB2 and stabilized MoB2 査読有り 国際誌

Superconductor Science and Technology   38 巻 ( 3 )   2025年2月

Comparative study of ferromagnetism in non-Heisenberg 1/1 and 2/1 quasicrystal approximants 査読有り 国際誌

Farid Labib, Takafumi D. Yamamoto, Asuka Ishikawa, Ryuji Tamura

Physical Review B   109 巻 ( 17 )   2024年3月

Experimental exploration of ErB2 and SHAP analysis on a machine-learned model of magnetocaloric materials for materials design 査読有り 国際誌 Open Access

Kensei Terashima, Pedro Baptista de Castro, Akiko Takahashi Saito, Takafumi D Yamamoto, Ryo Matsumoto, Hiroyuki Takeya, Yoshihiko Takano

Science and Technology of Advanced Materials: Methods   3 巻 ( 1 )   2023年6月

能動的蓄冷式磁気冷凍（AMRR）による水素液化のための磁気冷凍材料 査読有り

齋藤 明子, 竹屋 浩幸, 山本 貴史, 神谷 宏治, 松本 宏一, 沼澤 健則

低温工学   58 巻 ( 2 ) 頁： 51 - 57   2023年3月

Crystal electric field level scheme leading to giant magnetocaloric effect for hydrogen liquefaction 査読有り 国際誌 Open Access

Noriki Terada, Hiroaki Mamiya, Hiraku Saito, Taro Nakajima, Takafumi D. Yamamoto, Kensei Terashima, Hiroyuki Takeya, Osamu Sakai, Shinichi Itoh, Yoshihiko Takano, Masashi Hase, Hideaki Kitazawa

Communications Materials   4 巻 ( 13 )   2023年2月

Neural networks for a quick access to a digital twin of scanning physical property measurements 査読有り 国際誌 Open Access

Kensei Terashima, Pedro Baptista de Castro, Miren Garbiñe Esparza Echevarria, Ryo Matsumoto, Takafumi D. Yamamoto, Akiko T. Saito, Hiroyuki Takeya, Yoshihiko Takano

Digital Discovery   2 巻   頁： 339 - 345   2023年1月

High-Pressure Synthesis of Superconducting Sn3S4 Using a Diamond Anvil Cell with a Boron-Doped Diamond Heater 査読有り 国際誌 Open Access

R. Matsumoto, K. Terashima, S. Nakano, K. Nakamura, S. Yamamoto, T. D. Yamamoto, T. Ishikawa, S. Adachi, T. Irifune, M. Imai, Y. Takano

INORGANIC CHEMISTRY   61 巻 ( 10 ) 頁： 4476 - 4483   2022年3月

Enhancement of giant refrigerant capacity in Ho1-xGdxB2 alloys (0.1 ≤ x ≤ 0.4) 査読有り 国際誌 Open Access

P. B. Castro, K. Terashima, T. D. Yamamoto, S. Iwasaki, A. T. Saito, R. Matsumoto, S. Adachi, Y. Saito, M. ElMassalami, H. Takeya, Y. Takano

Journal of Alloys and Compounds   865 巻   頁： 158881   2021年6月

Effect of Dy substitution in the giant magnetocaloric properties of HoB2 査読有り 国際誌 Open Access

Pedro Baptista de Castro;Kensei Terashima;Takafumi D. Yamamoto;Suguru Iwasaki;Ryo Matsumoto;Shintaro Adachi;Yoshito Saito;Hiroyuki Takeya;Yoshihiko Takano

Science and Technology of Advanced Materials   21 巻 ( 1 ) 頁： 849 - 855   2021年1月

Relationship between magnetic ordering and gigantic magnetocaloric effect in HoB2 studied by neutron diffraction experiment 査読有り 国際誌

N. Terada, K. Terashima, P. B. Castro, C. Colin, H. Mamiya, T. D. Yamamoto, H. Takeya, O. Sakai, Y. Takano, H. Kitazawa

Physical Review B   102 巻 ( 9 ) 頁： 094435   2020年9月

Demonstration of electric double layer gating under high pressure by the development of field-effect diamond anvil cell 査読有り 国際誌 Open Access

Shintaro Adachi, Ryo Matsumoto, Sayaka Yamamoto, Takafumi D. Yamamoto, Kensei Terashima, Yoshito Saito, Miren Esparza Echevarria, Pedro Baptista de Castro, Peng Song, Suguru Iwasaki, Hiroyuki Takeya, Yoshihiko Takano

Applied Physics Letters   116 巻 ( 22 ) 頁： 223506   2020年6月

Machine-learning-guided discovery of the gigantic magnetocaloric effect in HoB2 near the hydrogen liquefaction temperature 査読有り 国際誌 Open Access

P. B. Castro, K. Terashima, T. D Yamamoto, Z. Hou, S. Iwasaki, R. Matsumoto, S. Adachi, Y. Saito, P. Song, H. Takeya, Y. Takano

npg asia materials   12 巻   頁： 35   2020年5月

Impurity-Induced Spin-State Crossover in La0.8Sr0.2Co1-xAlxO3 査読有り 国際誌 Open Access

Ichiro Terasaki, Masamichi Ikuta, Takafumi D. Yamamoto, Hiroki Taniguchi

Crystals   8 巻 ( 11 ) 頁： 411   2018年10月

Photo-induced change of dielectric response in BaCoSiO4 stuffed tridymite 査読有り 国際誌

Hiroki Taniguchi, Hiroki Moriwake, Akihide Kuwabara, Takuma Okamura, Takafumi Yamamoto, Ryuji Okazaki, Mitsuru Itoh, Ichiro Terasaki

Journal of Applied Physics   115 巻 ( 16 ) 頁： 164103   2014年4月