Magnetic-field-induced ferroelectric polarization flop under pressure in TbMnO3

被引：1
|
作者：
Aoyama, Takuya [1 ]
Iyama, Ayato [1 ]
Shimizu, Katsuya [1 ]
Kimura, Tsuyoshi [1 ]
机构：
[1] Osaka Univ, Grad Sch Engn Sci, Div Mat Phys, Toyonaka, Osaka 5608531, Japan
来源：
INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014) | 2015年 / 592卷
关键词：
D O I：
10.1088/1742-6596/592/1/012118
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Magnetoelectric properties of multiferroic TbMnO3 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 Neel 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 degrees rotation of the cycloidal spiral plane from the bc plane to the ab plane.
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页数：5
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