Magnetic reversal of the ferroelectric polarization in a multiferroic spinel oxide.
Magnetic reversal of the ferroelectric polarization in a multiferroic spinel oxide.
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DOI：
10.1103/physrevlett.96.207204
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发表时间：
2006-05
影响因子：
8.6
通讯作者：
Y. Yamasaki;S. Miyasaka;Y. Kaneko;He Jp;T. Arima;Y. Tokura
中科院分区：
文献类型：
--
作者：
Y. Yamasaki;S. Miyasaka;Y. Kaneko;He Jp;T. Arima;Y. Tokura
在CoCr2O4的铁磁性尖晶石氧化物中，在25K以下发生了向锥形自旋有序转变的铁电转变，自发极化方向[110]垂直于横向螺旋分量的磁化易轴[001]和传播轴[110]，与基于自旋-电流模型的预测一致。小磁场(约0.1T)对自发磁化强度的反转导致自发极化的反转，表明铁磁体和铁电体的磁畴壁被钳制。
Ferroelectric transition has been detected in a ferrimagnetic spinel oxide of CoCr2O4 upon the transition to the conical spin order below 25 K. The direction [110] of the spontaneous polarization is normal to both the magnetization easy axis [001] and to the propagation axis [110] of the transverse spiral component, in accord with the prediction based on the spin-current model. The reversal of the spontaneous magnetization by a small magnetic field (approximately 0.1 T) induces the reversal of the spontaneous polarization, indicating the clamping of the ferromagnetic and ferroelectric domain walls.