Generation of electric polarization with rotating magnetic field in helimagnet ZnCr2Se4

被引：80

作者：

Murakawa, Hiroshi ^{[1
]}

Onose, Yoshinori ^{[1
]}

Ohgushi, Kenya

Ishiwata, Shintaro ^{[1
]}

Tokura, Yoshinori ^{[1
,2
]}

机构：

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

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

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2008年 / 77卷 / 04期

关键词：

ferroelectricity; helicity; proper screw; magnetoelectric effect; ZnCr2Se4;

D O I：

10.1143/JPSJ.77.043709

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Application of magnetic field (H) can produce the ferroelectric polarization (P) in a proper screw helimagnet, ZnCr2Se4. While rotating H, we observed the cyclic generation of polarization current arising from the change of P in the conical spin structure. Versatile variations of P in magnitude and sign are observed while changing the direction and magnitude of H. The behaviors are ascribed to the rotation of the spin cones and the conserving or reversing spin-helicity upon the flop of the screw propagation vector, as affected by the competition among the magnetic anisotropy, inclination of the cone axis to H, and the P domain-wall stability.

引用

页数：4

共 18 条

[1] Multiferroics: a magnetic twist for ferroelectricity [J].