Research field (3):
Magnetism, superconductivity, and strongly correlated systems
, Semiconductors, optical and atomic physics
, Mathematical physics and basic theory
2020 - 2023 The mechanism of the multistability in competing systems of long-range interactions of elastic origin and their novel cooperative phenomena in photoinduced phase transitions
2018 - 2023 多自由度の協力現象として現れる量子効果とダイナミクスの研究
2021 - 2023 原子論に基づく次世代マイクロマグネティクスによる保磁力制御法の開発
2017 - 2020 Various ordering states in photo-induced phase transitions and the effect of the elastic interaction in the dynamics
2014 - 2017 Dynamics of lattice distortion in photoinduced phase transitions
2013 - 2017 New type of ordered phases due to effective longrange interaction of lattice deformation
2011 - 2015 Control of spin order and observation of its dynamical behavior by using pulsed terahertz electromagnetic wave
2011 - 2014 Novel dynamics of photo-induced phase transitions in systems with elastic long-range interactions
2010 - 2011 遷移金属化合物における弾性相互作用の研究
2008 - 2011 Study of optical control of macroscopic state in spin-crossover compounds
2006 - 2011 量子相互作用による動的現象の理論的研究
2008 - 2009 スピンクロスオーバー系の光誘起相転移機構の基礎研究
2008 - 2009 ベルサイユ大学磁気光学研究室(フランス国)との共同研究
2005 - 2009 Development of order-N DFT methods and the application on nano materials
2007 - 2008 磁性錯体の光スイッチング機構解明とデバイスへの応用
2006 - 2008 磁性金属錯体の光誘起相転移機構の理論的解明と光メモリー設計への展開
2006 - 2008 完全にフラストレートした磁性体における量子磁気混合
2005 - Ultrafast Phenomena In Cooperative Systems
2005 - スピンクロスオーバー化合物における光誘起相転移の機構解明と光メモリーデバイスへの展開
2000 - 2003 光照射や不純物により誘起される量子物性と相転移の基礎理論と物質設計への展開
1997 - 2000 有機金属共役系の電子状態と電子物性に関する理論的研究
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Papers (122):
Seiji Miyashita, Masamichi NISHINO, Cristian Enachescu. Mechanisms of Separation of the Elastic Step and the Thermal Step. European Journal of Inorganic Chemistry. 2024
Masamichi NISHINO, Seiji Miyashita. Dynamical Simulation for Long-Time Relaxation From Metastable States: Quantitative Estimation of Coercive Field and Relaxation Time. European Journal of Inorganic Chemistry. 2024
Masamichi Nishino, Hiroshi Hayasaka, Seiji Miyashita. Thermodynamic properties of R2Fe14B (R=Dy, Nd) and dysprosium random substitution effect on coercivity in neodymium permanent magnets. Journal of Applied Physics. 2024. 136. 3
Shuntaro Nagashima, Yuji Yahagi, Masamichi Nishino, Takehiro Yamaoka, Kosuke Nakagawa, Junhao Wang, Shin-ichi Ohkoshi, Hiroko Tokoro. Direct Observation of Magnetic Domain and Magnetization Reversal on Prussian Blue-Based Magnetic Films. Journal of the American Chemical Society. 2023. 145. 42. 22934-22944
Laurentiu Stoleriu, Masamichi Nishino, Seiji Miyashita, Alexandru Stancu, Roman Bertoni, Eric Collet, Maciej Lorenc, Cristian Enachescu. Multiscale out-of-equilibrium dynamics driven by pulsed laser excitation in spin-crossover materials: A combined thermoelastic and mechanoelastic study. Physical Review B. 2023
西野 正理. 原子論を基礎としたスピンモデルによる永久磁石の磁気特性の研究-Study on magnetic properties of permanent magnets by spin models based on atomistic theory-次世代ナノテクノロジーを担う磁性理論・計算の新展開. 社団法人日本磁気学会研究会資料 = Bulletin of Topical Symposium of the Magnetics Society of Japan. 2024. 250. 39-44
西野正理, 早坂太志, 宮下精二. Development of Coercivity Control Method Using Next Generation Micromagnetics Based on Atomistic Theory. 村田学術振興・教育財団研究助成等成果報告書(Web). 2023. 37
Seiji MIYASHITA, Masamichi NISHINO, Yuta TOGA, Taichi HINOKIHARA, Ismail Enes UYSAL, Takashi MIYAKE, Hisazumi AKAI, Satoshi HIROSAWA, Akimasa SAKUMA. Atomistic Theory of Thermally Activated Magnetization Processes in Nd<sub>2</sub>Fe<sub>14</sub>B Permanent Magnet. Journal of the Japan Society of Powder and Powder Metallurgy. 2022. 69. Supplement. S126-S146
西野 正理, 宮下 精二. Nd2Fe14B磁石の原子論的モデルにおける確率的Landau-Lifshitz-Gilbert法およびモンテカルロ法による磁化反転解析 ("スピン"の可視化とその操作). 社団法人日本磁気学会研究会資料 = Bulletin of Topical Symposium of the Magnetics Society of Japan. 2016. 210. 1-7
Sakai O, Suzuki T, Nishino M. 16aAA-2 Origin of Anomalous Spin-Orbit Coupling in Spin-Polarized He^+ Beam Scattering II. Meeting Abstracts of the Physical Society of Japan. 2015. 70. 0. 424-424
Theoretical Descriptions of Spin-Transitions in Bulk Lattice (John Wiley & Sons, Chichester, UK)
John Wiley & Sons, Chichester, UK, 455-474 (2013). 2013
物性量子化学入門
講談社 2004 ISBN:4061533819
"Quantum dynamics of molecular magnets in dissipative environments" in Quantum Properties of Low-Dimensional Antiferromagnets
Kyushu University Press (Y. Ajiro, J-P Boucher eds.) 2002 ISBN:4873787408
Lectures and oral presentations (96):
Study on magnetic properties of permanent magnets by spin models based on atomistic theory
(2024)
Thermo-mechano-elastic model in layered spin crossover systems
(Phase Transition and Dynamical Properties of Spin Transition Materials (PDSTM) 2023 2023)
Quantitative estimation of coercive force of a magnetic grain by dynamical simulations
(Phase Transition and Dynamical Properties of Spin Transition Materials (PDSTM) 2023 2023)
Dynamics of spin-crossover material: Entropy-driven or Force-driven transition
(Phase Transition and Dynamical Properties of Spin Transition Materials (PDSTM) 2023 2023)
Direct observation of Magnetic Domain and Magnetization Reversal on Prussian Blue-based magnetic film
(Phase Transition and Dynamical Properties of Spin Transition Materials (PDSTM) 2023 2023)