Ferroelectricity induced by proper-screw type magnetic order

被引：388

作者：

Arima, Taka-hisa ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2007年 / 76卷 / 07期

关键词：

multiferroics; CuFeO2; spiral magnet; proper screw; cycloid; delafossite; ferroelectricity;

D O I：

10.1143/JPSJ.76.073702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A novel type of magnetic origin of ferroelectric polarization is proposed. In crystals with triclinic, monoclinic, or trigonal (rhombohedral) symmetries, the proper screw type of magnetic ordefing can induce ferroelectricity through the variation in the metal-ligand hybridization with spin-orbit coupling. The ferroelectric polarization in delafossite compounds Cu(Fe,Al)O-2 is successfully explained by the mechanism. The relation

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页数：4

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