Magnetic-field-induced ferroelectric polarization flop under pressure in TbMnO3
Magnetic-field-induced ferroelectric polarization flop under pressure in TbMnO3
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TbMnO3 中压力下磁场诱导的铁电极化随角异色
DOI：
10.1088/1742-6596/592/1/012118
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Katsuya Shimizu and Tsuyoshi Kimura
中科院分区：
文献类型：
--
作者：
Takuya Aoyama;Ayato Iyama;Katsuya Shimizu and Tsuyoshi Kimura
研究了旋序为摆线的多铁性TbMnO 3的磁电性质随外加压力和磁场的变化。我们发现在低于Tb磁矩的Néel温度2-3 GPa下，沿a轴沿着施加磁场时，铁电极化发生翻转。一个可能的起源的磁电转变的基础上所观察到的压力和磁场的铁电极化和介电弛豫的配置文件进行了讨论。这个翻转将起源于摆线螺旋平面从bc平面到ab平面的90度旋转。
Magnetoelectric properties of multiferroic TbMnO 3 with a cycloidal spiral spin order were investigated as functions of applied pressure and magnetic field. We found that a flop of ferroelectric polarization occurs by applying a magnetic field along the a axis under 2-3 GPa below the Néel temperature of Tb moments. A possible origin of the magnetoelectric transition is discussed based on the observed pressure and magnetic-field profiles of the ferroelectric polarization and the dielectric relaxation. This flop would originate from the 90 rotation of the cycloidal spiral plane from the bc plane to the ab plane.