Order parameters and phase diagram of multiferroic RMn2O5

被引：18
|
作者：
Harris, A. B. [1 ]
Aharony, Amnon [2 ]
Entin-Wohlman, Ora [2 ,3 ]
机构：
[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[2] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[3] Tel Aviv Univ, Tel Aviv, Israel
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.100.217202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The generic magnetic phase diagram of multiferroic RMn2O5 (with R = Y, Ho, Tb, Er, Tm), which allows different sequences of ordered magnetic structures for different R's and different control parameters, is described using order parameters which explicitly incorporate the magnetic symmetry. A phenomenological magnetoelectric coupling is used to explain why some of these magnetic phases are also ferroelectric. Several new experiments, which can test this theory, are proposed.
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页数：4
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