Magnetic properties and origins of ferroelectric polarization in multiferroic CaMn7O12
Magnetic properties and origins of ferroelectric polarization in multiferroic CaMn7O12
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多铁性 CaMn7O12 的磁性和铁电极化起源
DOI：
10.1103/physrevb.87.075127
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发表时间：
2013-02
影响因子：
3.7
通讯作者：
J. S. Zhu
中科院分区：
文献类型：
--
作者：
J. T. Zhang;X. M. Lu;J. Zhou;H. Sun;F. Z. Huang;J. S. Zhu
在模型分析和第一性原理计算的基础上，研究了最近发现的多铁材料CaMnO的磁性和铁电极化的来源。我们发现，在极化的起源中，非共线型交换-约束机制和自旋轨道耦合的p-d杂化机制并存。诱发巨铁电性主要归因于前者，它与两种电荷序链结合在一起，并与锰离子具有相同的螺旋自旋手性有关。我们的结果证实了这两种机制引起的极化分别遵循和定律。
The magnetic properties and the origins of ferroelectric polarization in recently discovered multiferroics material CaMnOhave been investigated on the basis of model analysis and first-principles calculations. We find the noncollinear-type exchange-striction mechanism and thep-dhybridization with spin-orbit coupling coexist in the origins of polarization. The induced giant ferroelectricity can be mainly attributed to the former, related to two kinds of charge-order chains combined with the same spiral spin chirality as Mn ions. Our results confirm that the polarization induced by the two mechanisms follows theandlaws, respectively.