spin current and motive force due to domain wall motion

2009 Fiscal Year Self-evaluation Report

• Project Area: Creation and control of spin current
• Project/Area Number: 19048009
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Japan Atomic Energy Agency (2010); Tohoku University (2007-2009)
• Principal Investigator: MAEKAWA Sadamichi Tohoku University, 金属材料研究所, 教授 (60005973)
• Project Period (FY): 2007 – 2010
• Keywords: スピン流 / 起電力 / 磁化運動 / 磁壁 / 磁気渦 / 磁性ナノ粒子

Research Abstract

近年、電子のスピン自由度を用いる、スピンエレクトロニクスが注目を集めている。スピンの流れである「スピン流」はこの中心概念を担っており、その全容の把握が求められている。本研究は、磁化の運動に伴うスピン流の生成と電流との相互変換に関する量子論的基礎を確立し、現象の解明と新機能を有する磁気デバイスの開発を目的とする。

Research Products

• [Journal Article] Electromotive force and huge magnetoresistance in magnetic tunnel junctions (2009)
  • Author(s): P.N. Hai, S. Ohya, M. Tanaka, S.E. Barnes, S. Maekawa
  • Journal Title: Nature 458 Pages: 489-492
  • Peer Reviewed
• [Journal Article] Electrical measurements of the polarization in a moving magnetic vortex (2009)
  • Author(s): J. Ohe, S.E. Barnes, H.W. Lee, S. Maekawa
  • Journal Title: Appl. Phys. Lett. 95 Pages: 123110(1-3)
  • Peer Reviewed
• [Journal Article] Universality classes for domain wall motion in the ferromagnetic semiconductor (Ga, Mn)As (2007)
  • Author(s): M. Yamanouchi, J. Ieda, F. Matsukura, S.E. Barnes, S. Maekawa, H. Ohno
  • Journal Title: Science 317 Pages: 1726-1729
  • Peer Reviewed
• [Journal Article] Generalization of Faraday's Law to Include Nonconservative Spin Forces (2007)
  • Author(s): S.E. Barnes, S. Maekawa
  • Journal Title: Phys. Rev. Lett. 98 Pages: 246601(1-4)
  • Peer Reviewed
• [Journal Article] Supercurrent Pumping in Josephson Junctions with a Half-Metallic Ferromagnet (2007)
  • Author(s): S. Takahashi, S. Hikino, M. Mori, J. Martinek, S. Maekawa
  • Journal Title: Phys. Rev. Lett. 99 Pages: 057003(1-4)
  • Peer Reviewed
• [Presentation] Spin Motive Force in Magnetic Nanostructures (2010)
  • Author(s): S. Maekawa
  • Organizer: NewSpin
  • Place of Presentation: Utrecht, Netherlands
  • Year and Date: 2010-01-07
• [Presentation] GMR(巨大磁気抵抗効果)からTMR(トンネル磁気抵抗効果)へ (2009)
  • Author(s): 前川禎通
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-29
• [Presentation] Non-Local Spin Transport and Spin Motive Force in Magnetic Nanostructures (2008)
  • Author(s): S. Maekawa
  • Organizer: The 53rd Annual Conference on Magnetism and Magnetic Materials, American Center for Physics
  • Place of Presentation: Austin, Taxes, USA
  • Year and Date: 2008-11-13
• [Presentation] Spin Motive Force in Magnetic Nanostructures (2008)
  • Author(s): S. Maekawa
  • Organizer: 421st. Wilhelm and Else Heraeus Seminar on Spin Hall Effect
  • Place of Presentation: Physikzentrum, Bed Honeff, Germany
  • Year and Date: 2008-10-20
• [Presentation] Tunnel Magnetoresistance, Spin Accumulation, and Spin Hall Effect (2008)
  • Author(s): S. Maekawa
  • Organizer: The American Physical Society March Meeting 2008
  • Place of Presentation: New Orleans, USA
  • Year and Date: 2008-03-14
• [Presentation] Spin Current vs. Charge Current in Magnetic Nanostructures (2007)
  • Author(s): S. Maekawa
  • Organizer: Yukawa International Seminar 2007
  • Place of Presentation: Kyoto
  • Year and Date: 2007-11-20
• [Book] スピントロニクスの基礎と材料・応用技術の最前線 (2009)
  • Author(s): 高橋三郎、前川禎通
  • Total Pages: 28-36
  • Publisher: シーエムシー出版
• [Remarks]
  • URL: http://www.maekawa-lab.imr.tohoku.ac.jp
• [Patent(Industrial Property Rights)] 磁気電気エネルギー変換装置、電源装置および磁気センサ (2010)
  • Inventor(s): 田中雅明, ファムナムハイ, 大矢忍, スチュワートバーンズ, 前川禎通
  • Industrial Property Rights Holder: 東京大学, 東北大学, スチュワートバーンズ
  • Industrial Property Number: 特許・PCT/JP2010/053668
  • Filing Date: 2010-03-05