Electric polarization rotation in a hexaferrite with long-wavelength magnetic structures
Electric polarization rotation in a hexaferrite with long-wavelength magnetic structures
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DOI：
10.1103/physrevlett.94.137201
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发表时间：
2005-04-08
影响因子：
8.6
通讯作者：
Ramirez, AP
中科院分区：
文献类型：
--
作者：
Kimura, T;Lawes, G;Ramirez, AP
本文报道了在室温(RT)以上磁序的六角铁氧体中利用磁场(B)控制电场极化(P)。所研究的材料为六方相Ba0.5Sr1.5Zn2Fe12O22，这是一种零场基态的非铁电日磁绝缘体。通过施加B，系统经历了连续的变磁相变，并在一些具有长波长磁结构的B诱导相中显示出伴随的铁电有序。磁电感应P可以被外部B旋转360度，这不仅为RT磁电器件打开了可能性，也为基于磁控电光响应的器件打开了可能性。
We report on the control of electric polarization (P) by using magnetic fields (B) in a hexaferrite having magnetic order above room temperature (RT). The material investigated is hexagonal Ba0.5Sr1.5Zn2Fe12O22, which is a nonferroelectric helimagnetic insulator in the zero-field ground state. By applying B, the system undergoes successive metamagnetic transitions, and shows concomitant ferroelectric order in some of the B-induced phases with long-wavelength magnetic structures. The magnetoelectrically induced P can be rotated 360 degrees by external B. This opens up the potential for not only RT magnetoelectric devices but also devices based on the magnetically controlled electro-optical response.