研究活動

原著論文 2018年

2018.12.17

d-HDDR処理したNd-Fe-B-Ga-Nb磁石粉末の磁気異方性と微細組織および結晶方位との関係

堀川高志、山崎理央、三嶋千里(愛知製鋼株式会社)、松浦昌志、杉本 諭 (東北大学) (-)

2018.12.11

低酸素化によるSm-Fe-N系バルク磁石の高特性化

松浦 昌志  西島 佑樹  手束 展規  杉本 諭 (東北大学) (-)

2018.12.03

Development of ultra-fine grain sized SmFe12-based powders using hydrogenation disproportionation desorption recombination process

Imants Dirba, Hossein Sepehri-Amin, Tadakatsu Ohkubo, Kazuhiro Hono (https://doi.org/10.1016/j.actamat.2018.11.065)

2018.12.01

Coercivity and its thermal stability of Nd-Fe-B hot-deformed magnets enhanced by the eutectic grain boundary diffusion process

Jiangnan Li, Lihua Liu, Hossein Sepehri-Amin, Xin Tang, TadakatsuOhkubo, Noritsugu Sakuma, Tetsuya Shoji,Akira Kato, SCHREFLThomas, Kazuhiro Hono (https://doi.org/10.1016/j.actamat.2018.09.018)

2018.10.30

Exchange-interaction by the induced growth of the soft phase on the extreme hard phase

Hoju Kang, Satoshi Sugimoto (https://doi.org/10.1063/1.5042626 )

2018.10.29

Important Descriptors and Descriptor Groups of Curie Temperatures of Rare-earth Transition-metal Binary Alloys

Hieu Chi Dam, Viet Cuong Nguyen, Tien Lam Pham, Anh Tuan Nguyen, Kiyoyuki Terakura,Takashi Miyake, and Hiori Kino (https://doi.org/10.7566/JPSJ.87.113801)

2018.10.26

Unmasking the interior magnetic domain structure and evolution in Nd-Fe-B sintered magnetsthrough high-field magnetic imaging of the fractured surface

David Billington, Kentaro Toyoki, Hiroyuki Okazaki, Yoshinori Kotani, Tomoki Fukagawa, Takeshi Nishiuchi, Satoshi Hirosawa, and Tetsuya Nakamura (https://doi.org/10.1103/PhysRevMaterials.2.104413)

2018.10.18

Effect of R-site substitution and the pressure on stability of RFe12:A first-principles study

Yosuke Harashima, Taro Fukazawa, Hiori Kino, and Takashi Miyake (https://doi.org/10.1063/1.5050057)

2018.10.15

Permanent Magnets Beyond Nd-Dy-Fe-B

Satoshi Hirosawa (https://doi.org/10.1109/TMAG.2018.2863737)

2018.09.26

First-order reversal curve analysis of a Nd-Fe-B sintered magnet with soft X-ray magneticcircular dichroism microscopy

Kazunori Miyazawa, Satoshi Okamoto, Takahiro Yomogita, Nobuaki Kikuchi,Osamu Kitakami,Kentaro Toyoki, David Billington, Yoshinori Kotani,Tetsuya Nakamura, Taisuke Sasaki,Tadakatsu Ohkubo, Kazuhiro Hono (https://doi.org/10.1016/j.actamat.2018.09.053)

2018.09.24

Preparation of Mn-diffused Sm-Fe-N core-shell powder by reduction-diffusion process

Masashi Matsuura, Keisuke Yarimizu, Yohei Osawa, Nobuki Tezuka, Satoshi Sugimoto (TohokuUniversity),Takashi Ishikawa, Yukinobu Yoneyama (Sumiko Kunitomi Denshi Co. Ltd.) (https://doi.org/10.1016/j.jmmm.2018.09.084)

2018.09.06

Elastic and Magnetoelastic Properties of Fe-Rich Tetragonal Y–Fe Compounds- Phenomenology and Electron Theory

Jun-Ichiro Inoue(Tohoku University), Takuya Yoshioka(Tohoku University), Hiroki Tsuchiura(Tohoku University) (https://doi.org/10.1109/TMAG.2018.2865542)

2018.09.01

Searching the weakest link: Demagnetizing fields and magnetization reversal in permanent magnets

Johann Fischbacher, Alexander Kovacs,Lukas Ex, J. Kuhnel, Eduard Mehofer, SepehriAmin Hossein, Tadakatsu Ohkubo, Kazuhiro Hono,Thomas Schrefl (https://doi.org/10.1016/j.scriptamat.2017.11.020)

2018.09.01

Perspectives of stochastic micromagnetism of Nd2Fe14B and computation of thermally activated process

Seiji Miyashita, Masamichi Nishino, Yuta Toga, Taichi Hinokihara, Takashi Miyake, SatoshiHirosawa and Akimasa Sakuma (https://doi.org/10.1016/j.scriptamat.2017.11.012)

2018.09.01

Microstructure of a Dy-free Nd-Fe-B sintered magnet with 2 T coercivity

Xiandong Xu, Taisuke Sasaki, Jiangnan Li,Hossein Sepehri-Amin,Tae-Hoon Kim, Tadakatsu Ohkubo, Thomas Schrefl,Kazuhiro Hono (https://doi.org/10.1016/j.actamat.2018.06.037)

2018.08.28

First-principles study of spin-wave dispersion in Sm(Fe1−xCox)12

Taro Fukazawa, Hisazumi Akai, Yosuke Harashima and Takashi Miyake (https://doi.org/10.1016/j.jmmm.2018.08.071)

2018.08.17

Anisotropy of exchange stiffness based on atomic-scale magnetic properties in the rare-earth permanent magnet Nd2Fe14B

Yuta Toga, Masamichi Nishino, Seiji Miyashita, Takashi Miyake nd Akimasa Sakuma (https://doi.org/10.1103/PhysRevB.98.054418)

2018.08.06

Temperature dependent magnetization reversal process of a Ga-doped Nd-Fe-B sintered magnet based on first-order reversal curve analysis

Satoshi Okamoto, Kazunori Miyazawa, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki Tadakatsu Ohkubo, Kazuhiro Hono, Yukio Takada, Takashi Sato, Yuji Kaneko, Akira Kato

2018.08.02

Realization of a scanning soft X-ray microscope for magnetic imaging under high magnetic fields

Yoshinori Kotani, Yasunori Senba, Kentaro Toyoki, David Billington, Hiroyuki Okazaki, Akira Yasui, Wakana Ueno, Haruhiko Ohashi, Satoshi Hirosawa, Yu Shiratsuchi and Tetsuya Nakamura (https://doi.org/10.1107/S1600577518009177)

2018.07.31

Role of typical elements in Nd2Fe14X (X = B, C, N, O, F)

Yasutomi Tatetsu, Yosuke Harashima, Shinji Tsuneyuki, Takashi Miyake and Yoshihiro Gohda (https://doi.org/10.1103/PhysRevMaterials.2.074410)

2018.07.21

Increase of energy products of Zn-bonded Sm-Fe-N magnets with low oxygen content

Masashi Matsuura, Yuki Nishijima, Nobuki Tezuka, Satoshi Sugimoto (Tohoku University) Tetsuya Shoji, Noritsugu Sakuma (Toyota motor Corporation) (https://doi.org/10.1016/j.jmmm.2018.07.064)

2018.07.17

Bridging atomistic magnetism and coercivity in Nd-Fe-B magnets

Hiroki Tsuchiura(Tohoku University), Takuya Yoshioka(Tohoku University), Pavel Nov'ak(Institute of physics of ASCR) (https://doi.org/10.1016/j.scriptamat.2018.04.023)

2018.05.31

Temperature dependence of the crystal structures and phase fractions of secondary phases in a Nd-Fe-B sintered magnet

Naruki Tsuji, Hiroyuki Okazaki, Wakana Ueno, Yoshinori Kotani, David Billington, Akira Yasui, Shogo Kawaguchi, Kunihisa Sugimoto, Kentaro Toyoki, Tomoki Fukagawa, Takeshi Nishiuchi, Yoshihiro Gohda, Satoshi Hirosawa, Kazuhiro Hono, Tetsuya Nakamura (https://doi.org/10.1016/j.actamat.2018.05.020)

2018.05.24

Learning structure-property relationship in crystalline materials: A study of lanthanide–transition metal alloys

Tien-Lam Pham, Nguyen-Duong Nguyen, Van-Doan Nguyen, Hiori Kino, Takashi Miyake, andHieu-Chi Dam (https://doi.org/10.1063/1.5021089)

2018.04.18

Site-specific magnetic anisotropies in R2Fe14B systems

Takuya Yoshioka(Tohoku University), Hiroki Tsuchiura(Tohoku University) (https://doi.org/10.1063/1.5018875 )

2018.04.13

Mechanism for subgap optical conductivity in honeycomb Kitaev materials

Adrien Bolens, Hosho Katsura, Masao Ogata, and Seiji Miyashita (https://doi.org/10.1103/PhysRevB.97.161108)

2018.03.30

2018.1.19

Electron Theory on Grain-Boundary Structures and Local Magnetic Properties of Neodymium Magnets

Yoshihiro Gohda, Yasutomi Tatetsu, and Shinji Tsuneyuki (https://doi.org/10.2320/matertrans.M2017258)

2018.2.12

Diffusive real-time dynamics of a particle with Berry curvature

Kou Misaki, Seiji Miyashita, and Naoto Nagaosa (https://doi.org/10.1103/PhysRevB.97.075122)

2018.03.06

First-principles Study of Intersite Magnetic Couplings and Curie Temperature in RFe12−xCrx (R = Y, Nd, Sm)

Taro Fukazawa, Hisazumi Akai, Yosuke Harashima, and Takashi Miyake (https://doi.org/10.7566/JPSJ.87.044706)

2018.1.19

Fabrication of L10-FeNi phase by sputtering with rapid thermal annealing

Takayuki Tashiro, Masaki Mizuguchi, Takayuki Kojima, Tomoyuki Koganezawa, Masato Kotsugi,Takumi Ohtsuki, Kazuhisa Sato, Toyohiko Konno, Koki Takanashi (https://doi.org/10.1016/j.jallcom.2018.02.318)

2018.02.14

Magnetization measurements for grain boundary phases in Ga-doped

新津甲大(理化学研究所),佐藤敦子(九州大学),佐々木泰祐(NIMS),澤田龍之介(九州大学),Cho Youngji(九州大学),高田幸生(豊田中央研究所),佐藤岳(豊田中央研究所),金子裕治(豊田中央研究所),加藤晃(トヨタ自動車),大久保忠勝(NIMS),進藤大輔(理化学研究所),宝野和博(NIMS), CA 村上恭和(九州大学) (https://doi.org/10.1016/j.jallcom.2018.04.055)

2018.02.12

Diffusive real-time dynamics of a particle with Berry curvature

Kou Misaki, Seiji Miyashita, and Naoto Nagaosa (https://doi.org/10.1103/PhysRevB.97.075122)

2018.02.01

Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

Xin Tang, H. Sepehri-Amin, T. Ohkubo, K. Hono (https://doi.org/10.1016/j.scriptamat.2017.12.032)

2018.01.29

Shortcuts to adiabatic cat-state generation in bosonic Josephson junctions

Takuya Hatomura (https://doi.org/10.1088/1367-2630/aaa117)

2018.01.09

Crystal structure prediction accelerated by Bayesian optimization

Tomoki Yamashita, Nobuya Sato, Hiori Kino, Takashi Miyake, Koji Tsuda, and Tamio Oguchi (https://doi.org/10.1103/PhysRevMaterials.2.013803)


研究活動

文部科学省

文部科学省
元素戦略プロジェクト(活動紹介)
NIMS磁石パートナーシップ

元素戦略拠点

触媒・電池元素戦略拠点
触媒・電池元素戦略研究拠点 (京都大学)
東工大元素戦略拠点
東工大元素戦略拠点 (東京工業大学)
構造材料元素戦略研究拠点
構造材料元素戦略研究拠点 (京都大学)
高効率モーター用磁性材料技術研究組合
高効率モーター用 磁性材料技術研究組合