Roles of Bond Alternation in Magnetic Phase Diagram of RMnO3

被引：8

作者：

Furukawa, Nobuo ^{[1
,2
]}

Mochizuki, Masahito

机构：

[1] Aoyama Gakuin Univ, Dept Math & Phys, Kanagawa 2298558, Japan

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

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2010年 / 79卷 / 03期

关键词：

Heisenberg model; bond alternation; E-type structure; spin spiral state; A-type structure; RMnO3; multiferroics;

D O I：

10.1143/JPSJ.79.033708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In order to investigate the nature of the antiferromagnetic structures in perovskite RMnO3, we study a Heisenberg J(1)-J(2) model with bond alternation using analytical and numerical approaches. The magnetic phase diagram which includes incommensurate spiral states and commensurate collinear states is reproduced. We discuss that the magnetic structure with spin up arrow up arrow down arrow down arrow configuration (E-type structure) and the ferroelectricity emerge cooperatively to stabilize this phase. Magnetoelastic couplings are crucial to understand the magnetic and electric phase diagram of RMnO3.

引用

页数：4

共 18 条

[1] Origin of Electromagnon Excitations in Multiferroic RMnO3 [J].