Development of quantitative analysis method of electromagnetic fields based on small-angle electron scattering experiments

• Project/Area Number: 25600103
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Osaka Prefecture University
• Principal Investigator: Togawa Yoshihiko 大阪府立大学, 工学(系)研究科(研究院), 准教授 (00415241)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 電磁場解析 / 小角電子線散乱法 / 磁性人工格子 / スピントロニクス材料 / 電磁場イメージング法

Outline of Final Research Achievements

We have developed the imaging method of electromagnetic fields based on the data analysis of small-angle electron scattering experiments, which have significant advantages in quantitative detection of electromagnetic field distributions. Using small-angle electron scattering experiments, we clarified very fine magnetic structures of chiral magnetic orders uniquely formed in chiral helimagnets, which are one of promising materials for the next-generation spin electronics. The present methods will be utilized as fundamental method to perform quantitative analysis of electromagnetic field distributions or fine magnetic/dielectric structures in artificial magnetic lattice, spin electronics, or dielectric materials.

Research Products

• [Int'l Joint Research] グラスゴー大学(英国)
• [Journal Article] Magnetic soliton confinement and discretization effects arising from macroscopic coherence in a chiral spin soliton lattice (2015)
  • Author(s): Y. Togawa, T. Koyama, Y. Nishimori, Y. Matsumoto, S. McVitie, D. McGrouther, R. L. Stamps, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, I. G. Bostrem, V. E. Sinitsyn, A. S. Ovchinnikov, and J. Kishine
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 22 Pages: 220412-220412
  • DOI: 10.1103/physrevb.92.220412
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Chiral Soliton Lattice in Chiral Magnetic Crystal CrNb₃S₆ (2014)
  • Author(s): Y. Togawa, T. Koyama, S. Mori, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, A. S. Ovchinnikov, J. Kishine
  • Journal Title: Journal of the Japan Society of Powder and Powder Metallurgy Volume: 61 Issue: S1 Pages: S34-S36
  • DOI: 10.2497/jjspm.61.S34
  • NAID: 130004482707
  • ISSN: 0532-8799, 1880-9014
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Small-angle electron scattering of magnetic fine structures (2013)
  • Author(s): Y. Togawa
  • Journal Title: Microscopy Volume: 62 Issue: suppl 1 Pages: S75-S86
  • DOI: 10.1093/jmicro/dft007
  • Peer Reviewed
• [Presentation] Chiral Soliton Lattice in a Monoaxial Crystal of Chiral Magnet CrNb3S6 (2016)
  • Author(s): Y. Togawa
  • Organizer: University of Zaragoza ICMA Seminer
  • Place of Presentation: University of Zaragoza, Zaragoza, Spain
  • Year and Date: 2016-03-04
  • Int'l Joint Research / Invited
• [Presentation] Characterisation of helical and skyrmion structures using Lorentz microscopy (2016)
  • Author(s): S. McVitie, D. McGrouther, R. Lamb, M. Krajnak, Y. Togawa
  • Organizer: Core-to-Core International Meeting χMag2016 Symposium
  • Place of Presentation: オリエンタルホテル広島（広島県・広島市）
  • Year and Date: 2016-02-21
  • Int'l Joint Research
• [Presentation] Experimental Reports in Monoaxial Chiral Magnets (2016)
  • Author(s): Y. Togawa
  • Organizer: Core-to-Core International Meeting χMag2016 Symposium
  • Place of Presentation: オリエンタルホテル広島（広島県・広島市）
  • Year and Date: 2016-02-21
  • Int'l Joint Research / Invited
• [Presentation] キラルソリトン格子とスピン位相コヒーレンス (2015)
  • Author(s): 戸川欣彦
  • Organizer: 日本磁気学会 第205回研究会/第56回スピンエレクトロニクス専門研究会
  • Place of Presentation: 中央大学駿河台記念館（東京都・千代田区）
  • Year and Date: 2015-12-14
  • Invited
• [Presentation] 単軸性キラル磁性体の物性と機能 (2015)
  • Author(s): 戸川欣彦
  • Organizer: 物性研短期研究会 「スピン系物理の深化と最前線」
  • Place of Presentation: 東京大学物性研究所（千葉県・柏市）
  • Year and Date: 2015-11-16
  • Invited
• [Presentation] 電子線小角散乱法を用いた磁気微細構造解析 (2015)
  • Author(s): 戸川欣彦
  • Organizer: 2015年度 超高分解能顕微鏡法分科会 合宿研究会
  • Place of Presentation: KKRホテル金沢（石川県・金沢市）
  • Year and Date: 2015-09-25
  • Invited
• [Presentation] Chiral soliton lattice in a chiral monoaxial crystal CrNb3S6 (2015)
  • Author(s): Y. Togawa
  • Organizer: University of Leeds CMP Seminer
  • Place of Presentation: University of Leeds, Leeds, UK
  • Year and Date: 2015-09-12
  • Int'l Joint Research / Invited
• [Presentation] Chiral soliton lattice in monoaxial CrNb3S6 single crystal (2015)
  • Author(s): Y. Togawa
  • Organizer: International Workshop “Dzyaloshinskii-Moriya Interaction and Exotic Spin Strutcutre”（DMI2015）
  • Place of Presentation: Rizhskaya hotel, Pskov, RUSSIA
  • Year and Date: 2015-05-26
  • Int'l Joint Research
• [Presentation] カイラルソリトン格子のソリトン閉じ込め効果 (2015)
  • Author(s): 戸川欣彦，Stephen McVitie，Damien McGouther，Robert Stamps，西森祐太，松本悠，高阪勇輔，秋光純，西原禎文，井上克也，I. G. Bostrem，Vl. E. Sinitsyn，A. S. Ovchinnikov，岸根順一郎
  • Organizer: 日本物理学会2015年年次大会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] キラル磁気秩序におけるスピン位相コヒーレンス制御 (2014)
  • Author(s): 戸川欣彦
  • Organizer: 日本学術振興会Core-to-Coreプログラム2014年オープンセミナー
  • Place of Presentation: 東京大学本郷キャンパス
  • Year and Date: 2014-12-11
  • Invited
• [Presentation] Chiral soliton lattice in a chiral magnet CrNb3S6 (2014)
  • Author(s): Y. Togawa
  • Organizer: International Research Symposium on Chiral Magnetism（IRSChM2014）
  • Place of Presentation: Aster Plaza（広島県・広島市）
  • Year and Date: 2014-12-06 – 2014-12-08
• [Presentation] Patterned Magnetic Materials and Chiral Spin Textures (2014)
  • Author(s): R. L. Stamps, J.-V. Kim, S. McVitie, Y. Togawa
  • Organizer: International Research Symposium on Chiral Magnetism（IRSChM2014）
  • Place of Presentation: Aster Plaza（広島県・広島市）
  • Year and Date: 2014-12-06 – 2014-12-08
• [Presentation] A Lorentz microscopy study of states in a chiral soliton magnet (2014)
  • Author(s): S. McVitie, D. McGouther, R. Stamps, Y. Nishimori, T. Koyama, Y. Togawa, Y. Kousaka, J. Akimitsu
  • Organizer: International Research Symposium on Chiral Magnetism（IRSChM2014）
  • Place of Presentation: Aster Plaza（広島県・広島市）
  • Year and Date: 2014-12-06 – 2014-12-08
• [Presentation] カイラルスピンソリトン格子におけるスピン位相コヒーレンスの制御 (2014)
  • Author(s): 戸川欣彦
  • Organizer: 2014年物性セミナー
  • Place of Presentation: 東京大学駒場キャンパス
  • Year and Date: 2014-07-04
  • Invited
• [Presentation] カイラルらせん磁性体CrNb3S6の磁場応答 (2014)
  • Author(s): 小山司、戸川欣彦、西森祐太、森茂生、西原禎文、井上克也、高阪勇輔、秋光純、岸根順一郎
  • Organizer: 日本顕微鏡学会 第70回学術講演会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2014-05-11 – 2014-05-13
• [Presentation] Soliton injection and expulsion in helicoidal chiral magnets (2014)
  • Author(s): S. McVitie, D. McGouther, R Stamps, Y Nishimori, T Koyama, Y Togawa, Y Kousaka, J Akimitsu
  • Organizer: Intermag2014
  • Place of Presentation: Dresden, Germany
  • Year and Date: 2014-05-04 – 2014-05-08
• [Presentation] A Lorentz microscopy study of states in a chiral soliton magnet (2014)
  • Author(s): S. McVitie, D. McGouther, R Stamps, Y Nishimori, T Koyama, Y Togawa, Y Kousaka, J Akimitsu
  • Organizer: Magnetism 2014
  • Place of Presentation: Manchester, UK,
  • Year and Date: 2014-04-06 – 2014-04-08
• [Presentation] カイラル磁性のスピントロニクス応用への展望 (2014)
  • 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
  • Place of Presentation: 中央大学駿河台記念館
  • Invited
• [Presentation] カイラル磁性体CrNb3S6の磁気構造観察 (2013)
  • Author(s): 小山司，西森祐太，戸川欣彦，森茂生，高阪勇輔，秋光純，西原禎文，井上克也，岸根順一郎
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] 電子顕微鏡法を活用したスピンエレクトロニクス研究－次世代スピンエレクトロニクスの創成に向けて－ (2013)
  • Author(s): 戸川欣彦
  • Organizer: 日本顕微鏡学会関西支部「若手の会」
  • Place of Presentation: KKRホテルびわこ
  • Invited
• [Presentation] Chiral Soliton Lattice in monoaxial CrNb3S6 single crystal (2013)
  • Author(s): Y. Togawa, T. Koyama, Y. Nishimori, S. Mori, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, A. Ovchinnikov, J. Kishine
  • Organizer: International workshop «Dzyaloshinskii-Moriya Interaction and Exotic Spin Structures»
  • Place of Presentation: Veliky Novgorod, Russia
• [Presentation] Interlayer Magnetosesistance of Monoaxial Chiral Magnet (2013)
  • Author(s): Y. Togawa, Y. Kousaka, S. Nishihara, K. Inoue, J. Akimitsu, J. Kishine
  • Organizer: the Joint European Symposia on Magnetism (JEMS2013)
  • Place of Presentation: Rhodes, Greek
• [Presentation] Magnetoresistanve of monoaxial chiral helimagnet CrNb3S6 (2013)
  • Author(s): Y. Togawa, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, A. Ovchinnikov, J. Kishine
  • Organizer: 58th Annual MMM Conference
  • Place of Presentation: Denver, USA
• [Presentation] Chiral Spin Soliton Lattice in Monoaxial Chiral Magnet (2013)
  • Author(s): Y. Togawa
  • Organizer: Dalhousie University Seminar
  • Place of Presentation: Dalhousie University, Halifax, Canada
• [Presentation] カイラルソリトン格子
  • Author(s): 戸川欣彦
  • Organizer: カイラル磁性体研究会
  • Place of Presentation: 大阪大学