Details of the Researcher

PHOTO

Hiroshi Tsukahara
Section
Institute of Multidisciplinary Research for Advanced Materials
Job title
Assistant Professor
Degree

Research History 5

  • 2024/04 - Present
    Tohoku University　Institute of Multidisciplinary Research for Advanced Materials

  • 2021/04 - 2024/03
    The University of Osaka

  • 2014/04 - 2021/03
    High Energy Accelerator Research Organization　Institute of Materials Structure Science

  • 2010/04 - 2014/03
    National Institute of Advanced Industrial Science and Technology

  • 2008/04 - 2010/03
    National Institute of Advanced Industrial Science and Technology

Education 3

  • 東京工業大学　理工学研究科　物性物理学専攻 博士課程

    2005/04 - 2008/03

  • 東京工業大学　理工学研究科　物性物理学専攻 修士課程

    2003/04 - 2005/03

  • Gakushuin University　Faculty of Science　Department of Physics

    1999/04 - 2003/03

Professional Memberships 4

  • 日本磁気学会

    2010 - Present

  • 日本物理学会

    2004/09 - Present

  • 日本金属学会

    - Present

  • 高分子学会

    2012 - 2019

Research Interests 6

  • Condensed matter physics

  • Computational science

  • First-principles calculations

  • Hard magnetic materials

  • maicromagnetic simulation

  • Soft magnetic materials

Research Areas 3

  • Nanotechnology/Materials / Polymer materials / Coarse-Grained Molecular Dynamics Simulation

  • Natural sciences / Semiconductors, optical and atomic physics / Semiconductor superlattice, Two-dimensional elecrical conductivity

  • Natural sciences / Magnetism, superconductivity, and strongly correlated systems / magnetic materials, micromagnetic simulation

Papers 29

  1. General formulation of core loss in soft magnetic materials including effects of eddy current and magnetostriction Peer-reviewed

    Hiroshi Tsukahara, Haodong Huang, Kiyonori Suzuki, Kanta Ono, Akira Kato, Satoshi Okamoto

    Journal of Magnetism and Magnetic Materials　635　173597-173597　2025/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.jmmm.2025.173597 　

    ISSN： 0304-8853

  2. Formulation of energy loss due to magnetostriction to design ultraefficient soft magnets Peer-reviewed

    Hiroshi Tsukahara, Haodong Huang, Kiyonori Suzuki, Kanta Ono

    NPG Asia Materials　16　(1)　2024/03/26

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41427-024-00538-8 　

    eISSN： 1884-4057

    More details Close

    Abstract The mechanism of energy loss due to magnetostriction in soft magnetic materials was analytically formulated, and our experiments validated this formulation. The viscosity of magnetic materials causes the resistive force acting on magnetic domain walls through strain due to magnetostriction, and magnetic energy is eventually dissipated by friction even without eddy currents. This energy loss mechanism explains the frequency dependence of the excess loss observed in the experiments, and the excess loss is dominated by the contribution of magnetostriction when the magnetostriction constant exceeds approximately 20 ppm. The random anisotropy model was extended by considering the effect of local magnetostriction as a correction to the magnetocrystalline anisotropy. The effect of magnetostriction was considerably suppressed by the exchange-averaging effect. The estimated effective random magnetoelastic anisotropy for nanocrystalline α-Fe reached as low as 18.6 J/m3, but this static effect could not explain the high excess loss at high frequencies observed in the experiments. The results of this research could provide new design criteria for high-performance soft magnetic materials based on low magnetostriction to reduce the excess loss.

  3. Origin of excess core loss in amorphous and nanocrystalline soft magnetic materials Peer-reviewed

    H. Huang, H. Tsukahara, A. Kato, K. Ono, K. Suzuki

    Physical Review B　109　(10)　2024/03/08

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.109.104408 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  4. Effect of magnetostriction on ac initial permeability of amorphous and nanocrystalline alloys Peer-reviewed

    H. Huang, H. Tsukahara, A. Kato, K. Ono, K. Suzuki

    Journal of Magnetism and Magnetic Materials　592　171810-171810　2024/02

    Publisher: Elsevier BV

    DOI： 10.1016/j.jmmm.2024.171810 　

    ISSN： 0304-8853

  5. Precession dynamics of a small magnet with non-Markovian damping: Theoretical proposal for an experiment to determine the correlation time Peer-reviewed

    Hiroshi Imamura, Hiroko Arai, Rie Matsumoto, Toshiki Yamaji, Hiroshi Tsukahara

    Journal of Magnetism and Magnetic Materials　553　169209-169209　2022/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.jmmm.2022.169209 　

    ISSN： 0304-8853

  6. Role of magnetostriction on power losses in nanocrystalline soft magnets Peer-reviewed

    Hiroshi Tsukahara, Hiroshi Imamura, Chiharu Mitsumata, Kiyonori Suzuki, Kanta Ono

    NPG Asia Materials　14　(1)　2022/05/20

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41427-022-00388-2 　

    ISSN： 1884-4049

    eISSN： 1884-4057

    More details Close

    Abstract Soft magnetic materials are key materials for the magnetic cores used in motors and generators. To improve the energy efficiency of magnetic cores, it is important to understand the mechanism of energy loss under oscillating magnetic fields. Here, we clarify the mechanism of energy loss in nanocrystalline soft magnetic materials (NSMMs), which are candidates for energy-efficient magnetic cores. To investigate the energy loss of an NSMM, it is necessary to consider the interaction between the magnetization and the crystal lattice, i.e., magnetostriction. However, the random distributions of crystalline axes in nanocrystals hinder magnetostriction calculation. We developed a micromagnetic simulation program by formulating the effective fields due to magnetostriction in randomly oriented nanocrystallites. We performed micromagnetic simulations of NSMMs under an oscillating magnetic field and found that the magnetic energy of the moving domain wall dissipates into the elastic energy of the crystal lattice through magnetostriction. These results can enable the design of highly energy-efficient NSMMs.

  7. Relationship between magnetic nucleation and the microstructure of a hot-deformed permanent magnet: micromagnetic simulation Peer-reviewed

    Hiroshi Tsukahara, Kaoru Iwano, Tadashi Ishikawa, Chiharu Mitsumata, Kanta Ono

    NPG Asia Materials　12　(1)　2020/04/17

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41427-020-0210-2 　

    ISSN： 1884-4049

    eISSN： 1884-4057

    More details Close

    Abstract The grains initiating magnetization reversal in the microstructure of a hot-deformed permanent magnet have been identified in this study by performing micromagnetic simulations based on the Landau–Lifshitz–Gilbert equation. Hot-deformed permanent magnets comprise tabular grains, the easy-axis orientations of which are inclined with respect to the nominal easy axis of the permanent magnet. In the simulation model, the grains complexly overlap, similar to in actual permanent magnets. We analyze the simulation results considering grain overlap and the easy-axis tilt angles of the grains. The initiation of magnetic nucleation requires a high concentration of grains with large easy-axis tilt angles. We clarify the magnetic-nucleation process and provide a method to enhance the performance of permanent magnets by avoiding a high concentration of grains with large easy-axis tilt angles.

  8. Chaos in nanomagnet via feedback current Peer-reviewed

    Tomohiro Taniguchi, Nozomi Akashi, Hirofumi Notsu, Masato Kimura, Hiroshi Tsukahara, Kohei Nakajima

    Physical Review B　100　(17)　2019/11/21

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.100.174425 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  9. Large-Scale Micromagnetics Simulation of Magnetization Dynamics in a Permanent Magnet during the Initial Magnetization Process Peer-reviewed

    Hiroshi Tsukahara, Kaoru Iwano, Tadashi Ishikawa, Chiharu Mitsumata, Kanta Ono

    Physical Review Applied　11　(1)　2019/01/07

    DOI： 10.1103/PhysRevApplied.11.014010 　

    eISSN： 2331-7019

  10. First-principles prediction of ultralow resistance-area product and high magnetoresistance ratio in magnetic tunnel junction with a rock-salt type ZnO barrier Peer-reviewed

    Hiroshi Tsukahara, Hiroshi Imamura

    Japanese Journal of Applied Physics　58　(1)　010910-010910　2019/01/01

    Publisher: IOP Publishing

    DOI： 10.7567/1347-4065/aaf00e 　

    ISSN： 0021-4922

    eISSN： 1347-4065

  11. Effect of grain boundary phase on the magnetization reversal process of nanocrystalline magnet using large-scale micromagnetic simulation Peer-reviewed

    Hiroshi Tsukahara, Kaoru Iwano, Chiharu Mitsumata, Tadashi Ishikawa, Kanta Ono

    AIP Advances　8　(5)　2018/05/01

    DOI： 10.1063/1.5006852 　

    eISSN： 2158-3226

  12. Zero-Bias-Field Spin Torque Induced Oscillation of a Vortex Core in a Magnetic Junction Nano-Pillar with High Magnetoresistance Ratio Peer-reviewed

    Hiroshi Tsukahara, Hiroshi Imamura

    Journal of the Physical Society of Japan　86　(6)　064805-064805　2017/06/15

    Publisher: Physical Society of Japan

    DOI： 10.7566/jpsj.86.064805 　

    ISSN： 0031-9015

    eISSN： 1347-4073

  13. Magnetization reversal processes of isotropic permanent magnets with various inter-grain exchange interactions Peer-reviewed

    Hiroshi Tsukahara, Kaoru Iwano, Chiharu Mitsumata, Tadashi Ishikawa, Kanta Ono

    AIP Advances　7　(5)　2017/05/01

    DOI： 10.1063/1.4976950 　

    eISSN： 2158-3226

  14. Micromagnetic simulation for the magnetization reversal process of Nd-Fe-B hot-deformed nanocrystalline permanent magnets Peer-reviewed

    Hiroshi Tsukahara, Kaoru Iwano, Chiharu Mitsumata, Tadashi Ishikawa, Kanta Ono

    AIP Advances　7　(5)　2017/05/01

    DOI： 10.1063/1.4978645 　

    eISSN： 2158-3226

  15. Implementation of low communication frequency 3D FFT algorithm for ultra-large-scale micromagnetics simulation Peer-reviewed

    Hiroshi Tsukahara, Kaoru Iwano, Chiharu Mitsumata, Tadashi Ishikawa, Kanta Ono

    Computer Physics Communications　207　217-220　2016/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.cpc.2016.06.013 　

    ISSN： 0010-4655

  16. Large-scale micromagnetics simulations with dipolar interaction using all-to-all communications Peer-reviewed

    Hiroshi Tsukahara, S.-J. Lee, Kaoru Iwano, Nobuhito Inami, Tadashi Ishikawa, Chiharu Mitsumata, Hideto Yanagihara, Eiji Kita, Kanta Ono

    AIP Advances　6　(5)　2016/03/11

    Publisher: AIP Publishing

    DOI： 10.1063/1.4944338 　

    eISSN： 2158-3226

    More details Close

    We implement on our micromagnetics simulator low-complexity parallel fast-Fourier-transform algorithms, which reduces the frequency of all-to-all communications from six to two times. Almost all the computation time of micromagnetics simulation is taken up by the calculation of the magnetostatic field which can be calculated using the fast Fourier transform method. The results show that the simulation time is decreased with good scalability, even if the micromagentics simulation is performed using 8192 physical cores. This high parallelization effect enables large-scale micromagentics simulation using over one billion to be performed. Because massively parallel computing is needed to simulate the magnetization dynamics of real permanent magnets composed of many micron-sized grains, it is expected that our simulator reveals how magnetization dynamics influences the coercivity of the permanent magnet.

  17. Rotational motion of a magnetic vortex in a circular disk induced by injection of an electric current through an off-centered point contact Peer-reviewed

    Hiroshi Tsukahara, Hiroshi Imamura

    Physical Review B　90　(21)　2014/12/24

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.90.214437 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  18. Boltzmann Transport Equation of Transverse Spin Current in Weak-Coupling Limit Peer-reviewed

    Hiroshi Tsukahara, Hiroshi Imamura

    Journal of the Physical Society of Japan　82　(11)　114601-114601　2013/11/15

    Publisher: Physical Society of Japan

    DOI： 10.7566/jpsj.82.114601 　

    ISSN： 0031-9015

    eISSN： 1347-4073

  19. Linear Frequency Modulation by Weak Bipolar Magnetic Fields for a Vortex-Mode Oscillation in a Nanocontact Magnetoresistive Spin-Torque-Oscillator Peer-reviewed

    Kousaku Miyake, Yoshihito Okutomi, Hiroshi Tsukahara, Hiroshi Imamura, Masashi Sahashi

    Applied Physics Express　6　(11)　113001-113001　2013/11/01

    Publisher: IOP Publishing

    DOI： 10.7567/apex.6.113001 　

    ISSN： 1882-0778

    eISSN： 1882-0786

  20. Current-Driven Vortex–Antivortex Pair Rotation in a Magnetic Thin Film with Multiple Contacts Peer-reviewed

    Hiroshi Tsukahara, Hiroko Arai, Hiroshi Imamura

    Journal of the Physical Society of Japan　82　(8)　084701-084701　2013/08/15

    Publisher: Physical Society of Japan

    DOI： 10.7566/jpsj.82.084701 　

    ISSN： 0031-9015

    eISSN： 1347-4073

  21. Spin-wave excitations induced by spin current through a magnetic point contact with a confined domain wall Peer-reviewed

    Hiroko Arai, Hiroshi Tsukahara, Hiroshi Imamura

    Applied Physics Letters　101　(9)　092405-092405　2012/08/27

    Publisher: AIP Publishing

    DOI： 10.1063/1.4745777 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  22. Enhancement of microwave oscillation under angled in-plane magnetic field in ferromagnetic nano-contact spin-valves Peer-reviewed

    Hiroaki Suzuki, Tetsuya Nakamura, Hiroaki Endo, Masaaki Doi, Hiroshi Tsukahara, Hiroshi Imamura, Hiromi N. Fuke, Susumu Hashimoto, Hitoshi Iwasaki, Masashi Sahashi

    Applied Physics Letters　99　(9)　2011/08/29

    Publisher: AIP Publishing

    DOI： 10.1063/1.3619835 　

    ISSN： 0003-6951

    eISSN： 1077-3118

    More details Close

    We investigated the microwave oscillation of resistance due to spin-transfer torque in ferromagnetic nano-contact spin-valves under an external in-plane magnetic field. We varied the direction of the external magnetic field and therefore the relative angle, θ, between magnetizations of the free and reference layers. We showed that the level of microwave oscillation takes a maximum value at around θ = 140°. We also showed that the microwave oscillation frequency increases with increases in the applied direct current.

  23. First-principles calculations for the magnetic phase diagram in electron-doped CaMnO3 under compressive and tensile strains Peer-reviewed

    Hiroshi Tsukahara, Shoji Ishibashi, Kiyoyuki Terakura

    Physical Review B　81　(21)　2010/06/11

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.81.214108 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  24. Pseudo-Band-Structure of Disordered Lateral Superlattice in Magnetic Field Peer-reviewed

    Hiroshi Tsukahara, Tsuneya Ando

    Journal of the Physical Society of Japan　79　(2)　024709-024709　2010/02/15

    Publisher: Physical Society of Japan

    DOI： 10.1143/jpsj.79.024709 　

    ISSN： 0031-9015

    eISSN： 1347-4073

  25. Pseudo-open-orbit in disordered quantum-wire array: Disappearance of cyclotron resonance Peer-reviewed

    Hiroshi Tsukahara, Tsuneya Ando

    Physica E: Low-dimensional Systems and Nanostructures　40　(5)　1309-1311　2008/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.physe.2007.09.001 　

    ISSN： 1386-9477

  26. Magneto-conductivity in lateral superlattices with fluctuating period Peer-reviewed

    Hiroshi Tsukahara, Tsuneya Ando

    Physica E: Low-dimensional Systems and Nanostructures　40　(2)　253-256　2007/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.physe.2007.06.007 　

    ISSN： 1386-9477

  27. Dynamical Conductivity in Disordered Quantum Wire Array Peer-reviewed

    Hiroshi Tsukahara, Tsuneya Ando

    Journal of the Physical Society of Japan　76　(7)　074705-074705　2007/07/15

    Publisher: Physical Society of Japan

    DOI： 10.1143/jpsj.76.074705 　

    ISSN： 0031-9015

    eISSN： 1347-4073

  28. Pseudo-intersubband transitions in lateral superlattices with fluctuating period Peer-reviewed

    Hiroshi Tsukahara, Tsuneya Ando

    AIP Conference Proceedings　893　707-708　2007

    Publisher: AIP

    DOI： 10.1063/1.2730086 　

    ISSN： 0094-243X

  29. Pseudo-Band-Structure in a Disordered Quantum Wire Array Peer-reviewed

    Hiroshi Tsukahara, Tsuneya Ando

    Journal of the Physical Society of Japan　74　(11)　3035-3040　2005/11/15

    Publisher: Physical Society of Japan

    DOI： 10.1143/jpsj.74.3035 　

    ISSN： 0031-9015

    eISSN： 1347-4073

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Books and Other Publications 3

  1. 超大規模マイクロ磁気シミュレーションと永久磁石への応用

    塚原宙, 小野寛太

    2025/03

  2. マイクロ磁気シミュレーションによるナノ結晶磁性材料での磁歪分布およびエネルギー損失機構の解明

    塚原宙, 鈴木清策, 小野寛太

    2023/05

  3. モーター用磁性材料の新たなエネルギーロス機構をマイクロ磁気シミュレーションにより解明

    塚原宙, 鈴木清策, 小野寛太

    2023/03

Presentations 25

  1. 鉄損における磁歪効果の理論研究

    塚原宙

    東北⼤学バルク軟磁性材料研究拠点第１回シンポジウム　2025/11/10

  2. Relationship between grain diameters and energy losses due to domain wall motion and magnetostriction Invited

    Hiroshi Tsukahara

    International symposium on Soft Magnetic Materials　2025/09/30

  3. Micromagnetic simulation considering magnetostriction effects in nanocrystalline soft magnetic materials

    塚原宙, 鈴木清策, 加藤晃, 小野寛太, 岡本聡

    第４９回日本磁気学会学術公演会　2025/09/18

  4. Grain size dependence of magnetostriction effects on excess loss in nanocrystalline soft magnetic materials

    Hiroshi Tsukahara, Kiyonori Suzuki, Akira Kato, Kanta Ono, Satoshi Okamoto

    The 27th Soft Magnetic Materials Conference　2025/09/10

  5. Modelling of magnetostriction in exchange-coupled two-phase soft magnetic nanostructures

    Hiroshi Tsukahara, Kiyonori Suzuki, Akira Kato, Kanta Ono, Satoshi Okamoto

    Trends in MAGnetism 2025　2025/09/02

  6. 多結晶軟磁性材料における磁歪効果の結晶粒径依存性

    塚原宙, 黄昊東, 鈴木清策, 小野寛太, 岡本聡

    日本金属学会2025年春期(第176回)講演大会　2025/03/10

  7. Physical origin of excess loss due to magnetostriction in soft magnetic materials Invited

    Hiroshi Tsukahara, Haodong Huang, Akira Kato, Kanta Ono, Kiyonori Suzuki, Satoshi Okamoto

    The 8th International Conference on Electronic Materials and Nanotechnology for Green Environment　2024/11/25

  8. 軟磁性材料における過剰損失発生機構の解明 Invited

    塚原宙, Haodong Huang, 鈴木清策, 小野寛太, 岡本聡

    第48回日本磁気学会学術講演会　2024/09/27

  9. 磁歪によるランダム磁気異方性とエネルギー損失機構の解明

    塚原宙, Haodong Huang, 鈴木清策, 小野寛太, 岡本聡

    日本金属学会2024年秋期第174回講演大会　2024/03/13

  10. Effects of magnetostriction on excess loss in nanocrystalline soft magnetic materials Invited

    Hiroshi Tsukahara, Hiroshi Imamura, Chiharu Mitsumata, Kiyonori Suzuki, Kanta Ono

    The 67th Annual Conference on Magnetism and Magnetic Materials　2022/10/31

  11. Large-scale micromagnetics simulation for initial magnetization process in Nd-Fe-B hot-deformed nanocrystalline magnet Invited

    Hiroshi Tsukahara, Kaoru Iwano, Chiharu Mitsumata, Tadashi Ishikawa, Kanta Ono

    The Minerals, Metals & Materials Society 2017 146th Annual Meeting and Exhibition　2017/02/28

  12. Theoretical study on the vortex-antivortex pair rotation in a magnetic thin-film with multi-contacts

    Hiroshi Tsukahara, Hiroko Arai, Hiroshi Imamura

    IEEE International Magnetics Conference (INTERMAG 2012)　2012/05/10

  13. Theoretical study on rotation of vortex-antivortex pairs in a magnetic thin film with multi-contact

    Hiroshi Tsukahara, Hiroshi Imamura

    The 2nd ASRC International Workshop on Magnetic Materials and Nanostructures　2012/01/13

  14. Spin transfer torque induced rotation of vortex-antivortex pairs in a magnetic thin-film with multi-contacts

    Hiroshi Tsukahara, Hiroshi Imamura

    Spin Master Voice workshop　2011/12/15

  15. Theoretical study of spin torque diode effect in nano size contact

    Hiroshi Tsukahara, Hiroshi Imamura

    Physics and Applications of Spin-related Phenomena in Semiconductors　2010/12/21

  16. Numerical studies on spin torque diode effect of a geometrically confined domain wall

    Hiroshi Tsukahara, Hiroshi Imamura

    ICAUMS2010　2010/12/07

  17. Magnetic Ordering in Electron doped CaMnO3 with Epitaxial Strain

    Hiroshi Tsukahara, Shoji Ishibashi

    AIST-RIKEN Joint WS on “Emergent Phenomena of Correlated Materials”　2009/03/04

  18. Magnetic Ordering and Exchange Interaction in Electron doped CaMnO3

    Hiroshi Tsukahara, Shoji Ishibashi

    Supercomputing in Solid State Physics 2009　2009/02/18

  19. Magnetic Ordering and Band Separation in Electron doped CaMnO3

    Hiroshi Tsukahara, Shoji Ishibashi

    Computational Science Workshop 2008　2008/12/09

  20. Magnetic and Electronic Structure in Electron doped CaMnO3

    Hiroshi Tsukahara, Shoji Ishibashi

    The 11th Asian Workshop on First-principles Electronic Structure Calculations　2008/11/04

  21. Pseudo-open-orbit in disordered quantum-wire array: Disappearance of cyclotron resonance

    Hiroshi Tsukahara, Tsuneya Ando

    17th International Conference on Electronic Properties of Two-Dimensional Systems　2007/07/17

  22. Magnetoconductivity in lateral superlattices with fluctuating period

    Hiroshi Tsukahara, Tsuneya Ando

    2nd International Symposium on Nanometer Scale Quantum Physics　2007/01/25

  23. Pseudo-intersubband transitions in lateral superlattices with fluctuating period

    Hiroshi Tsukahara, Tsuneya Ando

    28th International Conference on the Physics of Semiconductors　2006/06/26

  24. Pseudo-band-structure and transport in disordered quantum-wire

    Hiroshi Tsukahara, Tsuneya Ando

    16th International Conference on Electronic Properties of Two-Dimensional Systems　2005/06/13

  25. Appearance of pseudo-band-gaps in a disordered quantum wire array

    Hiroshi Tsukahara, Tsuneya Ando

    First International Symposium on Nanometer-scale Quantum Physics (nanoPHYS'05)　2005/01/27

Show all Show first 5

Industrial Property Rights 1

  1. 軟磁性材料の製造方法及び軟磁性材料

    塚原 宙, 小野 暢久, 谷口 卓也, 岡本 聡

    Property Type: Patent

Research Projects 4

  1. 次世代磁性受動素子開発に向けたMHz帯鉄損発現機構の解明

    谷口卓也, 塚原宙

    Offer Organization: 学術振興会

    System: 基盤研究C

    Institution: 東北大学

    2026/04 - 2029/03

  2. 圧粉磁心における結晶粒のネットワーク構造解析

    塚原宙, 谷口卓也, 諏訪智巳

    Offer Organization: 東北大学

    System: 東北大学附置研究所若手アンサンブルプロジェクト

    Institution: 東北大学

    2025/12 - 2026/03

  3. 大規模マイクロ磁気シミュレーションを用いた軟磁性材料におけるエネルギー損失機構の解明

    塚原宙

    Offer Organization: 東北大学

    System: スーパーコンピューター共同利用研究

    Institution: 金属材料研究所

    2025/08 -

  4. 大規模シミュレーションと機械学習を活用したデータ駆動型磁性材料開発

    小野寛太, 塚原宙

    Offer Organization: 大阪大学 3Dセンター

    System: 大規模計算機システム 公募型制度

    2024/04 - 2025/03

Media Coverage 1

  1. ナノ結晶軟磁性材料を使ったモーターのエネルギー損失原因は摩擦、KEKが解明 Myself

    マイナビニュース

    2022/05/22

    Type: Internet

Academic Activities 1

  1. 日本金属学会2024年秋期第174回講演大会 ソフト磁性材料

    2024/03/14 - 2024/03/14

    Activity type: Academic society, research group, etc.