Ferroelectric polarization flop in a frustrated magnet MnWO4 induced by a magnetic field

被引：405
|
作者：
Taniguchi, K. [1 ]
Abe, N.
Takenobu, T.
Iwasa, Y.
Arima, T.
机构：
[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808579, Japan
[3] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.97.097203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The relationship between magnetic order and ferroelectric properties has been investigated for MnWO4 with a long-wavelength magnetic structure. Spontaneous electric polarization is observed in an elliptical spiral spin phase. The magnetic-field dependence of electric polarization indicates that the noncollinear spin configuration plays a key role for the appearance of the ferroelectric phase. An electric polarization flop from the b direction to the a direction has been observed when a magnetic field above 10 T is applied along the b axis. This result demonstrates that an electric polarization flop can be induced by a magnetic field in a simple system without rare-earth 4f moments.
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页数：4
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