Rotation of an Electric Polarization Vector by Rotating Magnetic Field in Cycloidal Magnet Eu0.55Y0.45MnO3

被引：60

作者：

Murakawa, H. ^{[1
]}

Onose, Y. ^{[1
]}

Kagawa, F. ^{[1
]}

Ishiwata, S. ^{[2
]}

Kaneko, Y. ^{[1
]}

Tokura, Y. ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Japan Sci & Technol Agcy, ERATO,Multiferro Project, Tokyo 1138656, Japan

[2] RIKEN, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.101.197207

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

To clarify the microscopic origin of the gigantic magnetoelectric effect in multiferroics, we have investigated the variation of an electric polarization (P) vector under a rotating magnetic field (H) for a cycloidal helimagnet Eu0.55Y0.45MnO3 as a canonical example. P rotates smoothly by rotating H around the magnetic propagation wave vector k, which can be well understood by the rotation of the conical spin structure around k. We also show that the rotation process of the conical spin structure under H is crucial for the retention or reversal of the spin helicity or equivalently of the direction of P.

引用

页数：4

共 18 条

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