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

多铁磁体中自旋手性控制磁光效应

• 批准号: 21740237
• 负责人: TANIGUCHI Kouji
• 金额: $ 1.83万
• 依托单位: The University of Tokyo (2010)Tohoku University (2009)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740237/
• 关键词: マルチフェロイクス; 光学的電気磁気効果; イメージング; 磁気光学

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.

近年来，非空间反演对称自旋系统中的磁光效应，如磁手征效应，引起了人们的广泛关注。在这项研究中，我们试图观察磁电域，其中的空间反转对称性被打破的自旋安排。我们成功地可视化了（Cu，Ni）B_2O_4中的磁电畴，这是一种弱铁磁体，没有空间反转对称性。我们还通过各畴的光吸收的差异，可视化了具有自旋手性的畴和具有共线自旋排列的畴共存的两相共存状态。

项目成果

Magnetic-Field-Induced Polarization Flop in Multiferroic TmMn2O5

• DOI: 10.1103/physrevlett.103.077204
• 发表时间: 2009-08-14
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Fukunaga, M.;Sakamoto, Y.;Kohn, K.
• 通讯作者: Kohn, K.