Ferroelectricity induced by incommensurate-commensurate magnetic phase transition in multiferroic HoMn2O5

被引：37

作者：

Kimura, Hiroyuki ^{[1
]}

Kamada, Youichi

Noda, Yukio

Kaneko, Koji

Metokii, Naoto

Kohn, Key

机构：

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

[2] Japan Atom Enrgy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[3] Waseda Univ, Dept Phys, Tokyo 1698555, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 11期

关键词：

multiferroics; colossal magnetoelectric effect; neutron diffraction; incommensurate-commensurate magnetic phase transition; ferroelectricity;

D O I：

10.1143/JPSJ.75.113701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron diffraction measurements under high magnetic fields in multiferroic HoMn2O5 have revealed a clear relationship between microscopic magnetism and field-induced ferroelectricity. The applied magnetic field induces a first-order phase transition from an incommensurate magnetic order to a commensurate magnetic order, where a spontaneous electric polarization occurs. The one-to-one correspondence between the magnetic phase diagram and the dielectric phase diagram under magnetic field clearly indicates that the electric polarization is magnetically induced and the commensurate magnetic structure is indispensable to the ferroelectricity in the multiferroic RMn2O5 system.

引用

页数：4

共 25 条

[1] CRYSTAL STRUCTURE OF PARAMAGNETIC DYMN2O5 AT 298 DEGREES K [J].