Theory of ferromagnetism in Ca1-xLaxB6

被引：15

作者：

Murakami, S ^{[1
]}

Shindou, R

Nagaosa, N

Mishchenko, AS

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Correlated Electron Res Ctr, Tsukuba, Ibaraki 3050046, Japan

[3] RRC Kurchatov Inst, Moscow 123182, Russia

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.88.126404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Novel ferromagnetism in Ca1-xLaxB6 is studied in terms of the Ginzburg-Landau theory for excitonic-order parameters, taking into account symmetry of the wave functions. We found that the minima of the free energy break both inversion and time-reversal symmetries, while the product of these two remains preserved. This explains various novelties of the ferromagnetism and predicts a number of magnetic properties, including the magnetoelectric effect, which can be tested experimentally.

引用

页数：4

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