Neutron scattering study of novel electromagnetic effect

• Project/Area Number: 15K05123
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Institute of Physical and Chemical Research (2017); The University of Tokyo (2015-2016)
• Principal Investigator: Soda Minoru 国立研究開発法人理化学研究所, 創発物性科学研究センター, 研究員 (40463905)
• Co-Investigator(Kenkyū-buntansha): 益田 隆嗣 東京大学, 物性研究所, 准教授 (90313014) ; 浅井 晋一郎 東京大学, 物性研究所, 特別研究員 (00748410)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: マルチフェロイック / エレクトロマグノン / スピン・ネマティック相互作用 / 電気磁気効果 / マルチフェロイックス / 中性子散乱 / マルチフェロイクス / リラクサー磁性体 / スピンネマティック / スピン・ネマティック

Outline of Final Research Achievements

The origins of the spin-nematic interaction and the electromagnon were examined in the multiferroic system Ba2CoGe2O7 by the unpolarized and polarized neutron scattering measurements. The systems Ca2CoSi2O7 and Ba2CoSi2O7, which have the similar crystal structures, have been also studied to compare those with Ba2CoGe2O7. As results, we have found the unique electromagnetic effect through the spin-nematic interaction. The origin of the electromagnon in the multiferroics having the collinear magnetic structure was also clarified.

Research Products

• [Int'l Joint Research] オークリッジ国立研究所(米国)
• [Int'l Joint Research] Heinz Maier-Leibnitz Zentrum/Helmholtz-Zentrum Berlin(ドイツ)
• [Int'l Joint Research] オークリッジ国立研究所(ORNL)(米国)
• [Int'l Joint Research] ANSTO(オーストラリア)
• [Int'l Joint Research] オークリッジ国立研究所(ORNL)(米国)
• [Int'l Joint Research] ラザフォードアップルトン研究所(RAL)(英国)
• [Int'l Joint Research] Paul Scherrer Institute(PSI)(スイス)
• [Journal Article] Magnetic Structure and Dielectric State in the Multiferroic Ca2CoSi2O7 (2017)
  • Author(s): M. Soda, S. Hayashida, T. Yoshida, M. Akaki, M. Hagiwara, M. Avdeev, O. Zaharko, and T. Masuda
  • Journal Title: J. Phys. Soc. Jpn. Volume: 86 Issue: 6 Pages: 064703-064703
  • DOI: 10.7566/jpsj.86.064703
  • NAID: 210000134400
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dielectric Property and Diffuse Scattering in Relaxor Magnet LuFeCoO4 (2017)
  • Author(s): M. Soda and T. Masuda
  • Journal Title: Journal of Physics: Conference Series Volume: 828 Pages: 012001-012001
  • DOI: 10.1088/1742-6596/828/1/012001
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Continuous control of local magnetic moment by applied electric field in multiferroics Ba2CoGe2O7 (2016)
  • Author(s): M. Soda, S. Hayashida, B. Roessli, M. Mansson, J. S. White, M. Matsumoto, R. Shiina, and T. Masuda
  • Journal Title: Physical Review B Volume: 94 Issue: 9 Pages: 094418-094418
  • DOI: 10.1103/physrevb.94.094418
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Dielectric and Magnetic Properties in Relaxor Magnet LuFeCoO4 (2016)
  • Author(s): M. Soda and T. Masuda
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Issue: 3 Pages: 034713-034713
  • DOI: 10.7566/jpsj.85.034713
  • NAID: 210000133872
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Magnetic Anisotropy and Magnetoelectric Effect with Spin-Nematic Interaction (2018)
  • Author(s): M. Soda, M. Matsumoto, S. Hayashida, M. Mansson, B. Roessli, J. S. White, S. Ohira-Kawamura, K. Nakajima, V. O. Garlea, B. Winn, R. Shiina, T. Masuda
  • Organizer: 第16回日韓中性子科学会
• [Presentation] カゴメ・三角格子積層系RBaCo4O7(R=Y and Lu)における磁気散漫散乱 (2018)
  • Author(s): 左右田稔, 萩原雅人, Georg Ehlers, Feng Ye, 古川はづき, 森田克洋, 遠山貴巳, 益田隆嗣
  • Organizer: 日本物理学会
• [Presentation] マルチフェロイック物質Ba2CoGe2O7における磁気励起モード (2017)
  • Author(s): 左右田稔, Lieh-Jeng Chang, 松本正茂, V. Ovidiu Garlea, Barry Winn, Bertrand Roessli, Jonathan S. White, 古川はづき, 益田隆嗣
  • Organizer: 日本物理学会
• [Presentation] Superparamagnetism induced by Polar Nano Region in Relaxor Magnet (2017)
  • Author(s): M. Soda
  • Organizer: Deutsche Physikalische Gesellschaft (DPG) Spring Meeting
  • Place of Presentation: Dresden(Germany)
  • Invited
• [Presentation] 磁性と誘電性の新奇関係 (2016)
  • Author(s): 左右田稔
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大(宮城県仙台市)
  • Year and Date: 2016-03-19
  • Invited
• [Presentation] マルチフェロイック物質Ca2CoSi2O7の磁気構造 (2016)
  • Author(s): 左右田稔, 吉田俊也, 赤木暢, 萩原政幸, Oksana Zaharko, Maxim Avdeev, 伊藤晋一, 横尾哲也, 益田隆嗣
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大(宮城県仙台市)
  • Year and Date: 2016-03-19
• [Presentation] 中性子散乱による磁性と誘電性の新奇関係の研究 (2016)
  • Author(s): 左右田稔
  • Organizer: 日本中性子科学会
  • Place of Presentation: 名古屋大学(愛知県・名古屋市)
  • Invited
• [Presentation] リラクサー磁性体LuFeCoO4における中性子散乱研究 (2016)
  • Author(s): 左右田稔, 伊藤晋一, 横尾哲也, 益田隆嗣
  • Organizer: 日本物理学会
  • Place of Presentation: 金沢大学(石川県・金沢市)
• [Presentation] リラクサー磁性体LuFeCoO4における磁気励起 (2016)
  • Author(s): 左右田稔, 伊藤晋一, 横尾哲也, F. Demmel, 益田隆嗣
  • Organizer: 日本中性子科学会
  • Place of Presentation: 名古屋大学(愛知県・名古屋市)
• [Presentation] Nanomagnetism of Relaxor Magnet LuFeCoO4 with Triangular Lattice (2016)
  • Author(s): M. Soda and T. Masuda
  • Organizer: The 8th International Conference on Highly Frustrated Magnetism 2016 (HFM2016)
  • Place of Presentation: Taipei(Taiwan)
  • Int'l Joint Research
• [Presentation] カゴメ・三角格子積層系YBaCo4O7における中性子散乱研究 (2015)
  • Author(s): 左右田稔, 伊藤晋一, 横尾哲也, G.Ehlers, 益田隆嗣
  • Organizer: 日本中性子科学会
  • Place of Presentation: 和光市民文化センター(埼玉県和光市)
  • Year and Date: 2015-12-10
• [Presentation] 擬一次元反強磁性体Ba2CoSi2O7における中性子散乱研究 (2015)
  • Author(s): 左右田稔, Tao Hong, Maxim Avdeev, 益田隆嗣
  • Organizer: 日本物理学会
  • Place of Presentation: 関西大学(大阪府吹田市)
  • Year and Date: 2015-09-16