Control of the Magneto-optical effect by spin-chirality in multiferroic magnet

2010 Fiscal Year Final Research Report

• Project/Area Number: 21740237
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo (2010); Tohoku University (2009)
• Principal Investigator: TANIGUCHI Kouji The University of Tokyo, 大学院・新領域創成科学研究科, 講師 (30400427)
• Project Period (FY): 2009 – 2010
• Keywords: マルチフェロイクス / 光学的電気磁気効果 / イメージング

Research Abstract

Recently, the magneto-optical effect, such as magneto-chiral effect in the spin systems without space-inversion symmetry, has been attracting much attention. In this study, we have tried to observe the magnetoelectric domain, in which the space-inversion symmetry is broken by the spin arrangement. We have succeeded to visualize the magnetoelectric domain in (Cu,Ni) B2O4, which is the weak ferromagnet without space-inversion symmetry. We have also visualized the two-phase coexisting state, in which the domain with spin chirality and that with the collinear spin arrangement exist, through the difference of the optical absorption of each domain.

Research Products

• [Journal Article] Temperature-dependent Raman scattering study of multiferroic MnWO_4 (2010)
  • Author(s): L.H.Hoang, N.T.M.Hien, W.S.Choi, Y.S.Lee, K.Taniguchi, T.Arima, S.Yoon, X.B.Chen, I.S.Yang
  • Journal Title: Journal of Raman Spectroscopy 41 Pages: 1005-1010
  • Peer Reviewed
• [Journal Article] Electronic structure and anomalous band-edge absorption feature in multiferroic MnWO_4 : An optical spectroscopic study (2010)
  • Author(s): W.S.Choi, K.Taniguchi, S.J.Moon, S.S.A.Seo, T.Arima, H.Hoang, I.-S.Yang, T.W.Noh, Y S.Lee
  • Journal Title: Physical Review B 81 Pages: 205111-1-"205111-7"
  • Peer Reviewed
• [Journal Article] Observation of Spin Helicity Using Nonresonant Circularly Polarized X-ray Diffraction Analysis (2010)
  • Author(s): H.Sagayama, N.Abe, K.Taniguchi, T.Arima, Y.Yamasaki, D.Okuyama, Y.Tokura, S.Sakai, T.Morita, T.Komesu, H.Ohsumi, M.Takata
  • Journal Title: Journal of Physical Society of Japan 79 Pages: 043711-1-"043711-4"
  • Peer Reviewed
• [Journal Article] Optical imaging of coexisting collinear and spiral spin phases in the magnetoelectric multiferroic MnWO_4 (2010)
  • Author(s): K.Taniguchi, M.Saito, T.Arima
  • Journal Title: Physical Review B 81 Pages: 064406-1-"064406-5"
  • Peer Reviewed
• [Journal Article] Periodic rotation of magnetization in a non-centrosymmetric soft magnet induced by an electric field (2009)
  • Author(s): M.Saito, K.Ishikawa, S.Konno, K.Taniguchi, T.Arima
  • Journal Title: Nature Materials 8 Pages: 634-638
  • Peer Reviewed
• [Presentation] マルチフェロイック物質MnWO_4の光学特性 (2009)
  • Author(s): 谷口耕治, 齋藤充, 有馬孝尚
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本
  • Year and Date: 2009-09-27
• [Presentation] 非共鳴円偏光X線回折によるマルチフェロイック物質のスピンカイラリティの観測 (2009)
  • Author(s): 佐賀山基, 谷口耕治, 阿部伸行, 有馬孝尚, 山崎裕一, 奥山大輔, 十倉好紀, 酒井創一朗, 森田健史, 徳田哲久, 米須尚, 大隈寛幸, 高田昌樹
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本
  • Year and Date: 2009-09-27
• [Presentation] Observation of Spin Chirality using Circularly-Polarized Synchrotron Radiation X-rays (2009)
  • Author(s): H.Sagayama, N.Abe, K.Taniguchi, T.Arima, Y.Yamasaki, D.Okuyama, Y.Tokura, S.Sakai, T.Morita, T.Komesu, H.Ohsumi, M.Takata
  • Organizer: Gordon Research conference X-Ray Science
  • Place of Presentation: ウォータービル(アメリカ合衆国)
  • Year and Date: 2009-08-02
• [Presentation] Control of the electric polarization flop direction by a canted magnetic field in a magnetoelectric multiferroic material MnWO_4 (2009)
  • Author(s): K.Taniguchi, N.Abe, H.Umetsu, T.Arima
  • Organizer: International Conference on Magnetism
  • Place of Presentation: カールスルーエ(ドイツ)
  • Year and Date: 2009-07-28
• [Presentation] 磁性強誘電体MnWO_4のスピンカイラリティ制御 (2009)
  • Author(s): 有馬孝尚, 阿部伸行, 谷口耕治
  • Organizer: 第4回トピカルミーティング「フラストレーションとカイラリティ」
  • Place of Presentation: カールスルーエ(ドイツ)
  • Year and Date: 2009-07-04
• [Presentation] 非共鳴円偏光X線回折によるスピンカイラリティの観測 (2009)
  • Author(s): 佐賀山基, 谷口耕治, 阿部伸行, 有馬孝尚, 山崎裕一, 奥山大輔, 十倉好紀, 酒井創一朗, 森田健士, 米須尚, 大隈寛幸, 高田昌樹
  • Organizer: 第4回トピカルミーティング「フラストレーションとカイラリティ」
  • Place of Presentation: 神戸
  • Year and Date: 2009-07-03