Magnetic-Field-Induced Dielectric Anomaly and Electric Polarization in Co4Ta2O9

Magnetic-Field-Induced Dielectric Anomaly and Electric Polarization in Co4Ta2O9
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Co4Ta2O9 中磁场诱发的介电异常和电极化

DOI:
10.1111/jace.13651
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发表时间:
2015-07
影响因子:
3.9
通讯作者:
Du Youwei
Du Youwei
中科院分区:
材料科学2区
文献类型:
--
作者:
Fang Yong;Yan Shiming;Zhang Lei;Han Zhida;Qian Bin;Wang Dunhui;Du Youwei

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本文报道了Co4Ta2O9的磁性和电学性质,它是一种具有三角结构的共线反铁磁体。在零磁场下,该化合物无介电异常和电极化现象。外加磁场作用下产生有限介电峰和电极化,并随磁场的增大而增大,表现出磁介电和磁电性能。我们将Co4Ta2O9中磁场诱导的介电异常和电极化归因于自旋涨落和畴效应。
We report magnetic and electric properties of Co4Ta2O9, which is a collinear antiferromagnet with trigonal structure. At zero magnetic fields, no dielectric anomaly and electric polarization are observed in this compound. While, finite dielectric peaks and electric polarization develop under applied magnetic field, and increase with increasing field, showing magnetodielectric and magnetoelectric performance. We ascribe the magnetic-field-induced dielectric anomaly and electric polarization in Co4Ta2O9 to spin fluctuation and domain effect.
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