Microscopic analysis of spin-current spin wave and its application

2012 Fiscal Year Final Research Report

• Project/Area Number: 22686004
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: TOGAWA Yoshihiko 大阪府立大学, 21 世紀科学研究機構, 准教授 (00415241)
• Project Period (FY): 2010 – 2012
• Keywords: スピントロニクス / スピン流 / スピン波 / 磁化ダイナミクス / ローレンツ電子顕微鏡法 / 強磁性細線 / カイラル磁性体 / カイラル磁気秩序

Research Abstract

We have clarified the nature of spin wave induced by spin current, namely, spin-current spin wave in nanofabricated ferromagnetic wires mainly by means of in-situ transmission electron microscopy and have developed methods to control and manipulate the magnetization dynamics by using spin-current spin wave. These methods will be utilized as fundamental technology to obtain various functions of fast modulation, amplification, and inversion of spin electric signal in the next-generation spin electric devices.

Research Products

• [Journal Article] mall-angle electron scattering from magnetic artificial lattice (2012)
  • Author(s): K. Takayanagi, T. Koyama, S. Mori, K. Harada, Y. Togawa
  • Journal Title: J. Electron Microscopy Volume: 61 Pages: 401-407
  • Peer Reviewed
• [Journal Article] Chiral magnetic soliton lattice on chiral helimagnet (2012)
  • Author(s): Y. Togawa, T. Koyama, K. Takayanagi, S. Mori, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, A. S. Ovchinnikov, J. Kishine
  • Journal Title: Phys. Rev. Lett
  • Peer Reviewed
• [Journal Article] Unconventional magnetic domain structure in the ferromagnetic phase of MnP single crystals (2012)
  • Author(s): T. Koyama, S. Yano, Y. Togawa, Y. Kousaka, S. Mori, K. Inoue, J. Kishine, J. Akimitsu
  • Journal Title: J. Phys. Soc. Jpn Volume: 81
  • Peer Reviewed
• [Journal Article] Small angle electron diffraction and deflection (2012)
  • Author(s): T. Koyama, K. Takayanagi, Y. Togawa, S. Mori, K. Harada
  • Journal Title: AIP Advances 2
  • Peer Reviewed
• [Journal Article] Control of magnetic domain nucleation using spin current in Permalloy nanowires (2011)
  • Author(s): Y. Togawa, T. Kimura, K. Harada, A. Tonomura, Y. Otani
  • Journal Title: J. Phys. D: Appl. Phys. Volume: 44
  • Peer Reviewed
• [Journal Article] Magnetic Ripple in Permalloy Narrow Wires Investigated by Lorentz Microscopy (2010)
  • Author(s): K. Takayanagi, S. Mori, Y. Togawa
  • Journal Title: IEEE Xplore TENCON2010 Pages: 1875-1877
  • Peer Reviewed
• [Journal Article] Crystalline analysis of Permalloy narrow wires subject to current pulses (2010)
  • Author(s): Y. Togawa, K. Takayanagi, T. Kimura, K. Harada, T. Akashi, A. Tonomura, S. Mori, Y. Otani
  • Journal Title: J. Appl. Phys. Volume: 107
  • Peer Reviewed
• [Journal Article] スピン流に誘起される磁化ダイナミクス (2010)
  • Author(s): 戸川欣彦、木村崇、原田研、明石哲也、外村彰、大谷義近
  • Journal Title: 顕微鏡(日本顕微鏡学会誌) Volume: 45 Pages: 156-160
  • Peer Reviewed
• [Journal Article] Small angle electron scattering of magnetic fine structures
  • Author(s): Y. Togawa
  • Journal Title: To appear in Microscopy
  • Peer Reviewed
• [Presentation] 電子線小角散乱とカイラル磁気秩序 (2012)
  • Author(s): 戸川欣彦
  • Organizer: 第3回 CROSSroads 研究会「カイラル磁性体-起源と機能-」(招待講演)
  • Place of Presentation: いばらき量子ビーム研究センター
  • Year and Date: 2012-12-18
• [Presentation] スピンカイラル秩序の観測-スピン位相ソリトン格子 (2012)
  • Author(s): 戸川欣彦
  • Organizer: 平成24年度日本結晶学会年会 物理・鉱物系シンポジウム(招待講演)
  • Place of Presentation: 東北大学片平キャンパス
  • Year and Date: 2012-10-26
• [Presentation] 電子線小角散乱法によるスピントロニクス研究 (2012)
  • Author(s): 戸川欣彦
  • Organizer: 日本磁気学会スピンエレクトロニクス専門研究会(招待講演)
  • Place of Presentation: 名古屋大学
  • Year and Date: 2012-06-08
• [Presentation] Chiral magnetic order on chiral magnet (2012)
  • Author(s): Y. Togawa
  • Organizer: Tonomura FIRST International Symposium "Electron Microscopy and Gauge Fields"
  • Place of Presentation: Tokyo.
  • Year and Date: 2012-05-09
• [Presentation] 電子線で視るカイラル磁気秩序 (2012)
  • Author(s): 戸川欣彦
  • Organizer: 日本磁気学会分科会 化合物新磁性研究会(招待講演)
  • Place of Presentation: 東京大学本郷キャンパス(東京都)
  • Year and Date: 2012-03-02
• [Presentation] 磁性体における電子線の位相情報 (2011)
  • Author(s): 戸川欣彦
  • Organizer: 日本顕微鏡学会第55回シンポジウム(招待講演)
  • Place of Presentation: サンポート香川(香川県・高松市)
  • Year and Date: 2011-10-01
• [Presentation] スピン流が誘起する磁気縞ダイナミクス (2011)
  • Author(s): 戸川欣彦, 高柳和矢, 原田研,森茂生,仲谷栄伸
  • Organizer: 日本物理学会 2011 年秋季大会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2011-09-23
• [Presentation] パルス電流印加による磁気縞ダイナミクスのその場観察 (2011)
  • Author(s): 高柳和矢,原田研,森茂生,戸川欣彦
  • Organizer: 日本顕微鏡学会 第67回学術講演会
  • Place of Presentation: 福岡国際会議場(福岡県)
  • Year and Date: 2011-05-16
• [Presentation] Control of magnetic domain nucleation using spin current in Permalloy nanowires (Invited) (2010)
  • Author(s): Y. Togawa
  • Organizer: International Symposium on Advanced Materials and Applications (ISAMMA 2010)
  • Place of Presentation: Sendai(Japan)
  • Year and Date: 2010-07-13
• [Presentation] スピン流が誘起する磁気縞状態 (2010)
  • Author(s): 戸川欣彦,木村崇,原田研,明石哲也,外村彰,森茂生,仲谷栄伸,大谷義近
  • Organizer: 日本顕微鏡学会
  • Place of Presentation: 名古屋国際会議場(愛知県)
  • Year and Date: 2010-05-25
• [Remarks]
  • URL: http://www.osakafu-u.ac.jp/info/publicity/release/2011/20120227.html
• [Patent(Industrial Property Rights)] 電子顕微鏡、および回折像観察方法 (2011)
  • Inventor(s): 戸川欣彦、原田研、森茂生
  • Industrial Property Rights Holder: 大阪府立大学
  • Industrial Property Number: 特願 2011-61352
  • Filing Date: 2011-03-18