磁性薄膜中的自旋挠曲电性和手征自旋结构
Spin flexoelectricity and chiral spin structures in magnetic films
摘要：
本文从自旋挠曲电的角度，即磁化方向的弯曲与电极化的强度之间的关系出发，对磁性薄膜中所观察到的各种手征现象（自旋旋轮线和Skyrmion结构的形成以及手征性相关的畴壁运动）进行了综述。讨论了自旋挠曲电性与新出现的自旋挠曲磁性概念的异同。基于三位离子间接交换和扭曲RKKY相互作用模型的自旋挠曲电微观机制的分析支持的几何思想的曲率诱导效应的唯象参数。预测了单个Skyrmion的电场诱导产生。
英文摘要：
In this short review a broad range of chiral phenomena observed in magnetic films (spin cycloid and skyrmion structures formation as well as chirality dependent domain wall motion) is considered under the perspective of spin flexoelectricity, i.e. the relation between bending of magnetization pattern and electric polarization. The similarity and the difference between the spin flexoelectricity and the newly emerged notion of spin flexomagnetism is discussed. The phenomenological arguments based on the geometrical idea of curvature-induced effects are supported by analysis of the microscopic mechanisms of spin flexoelectricity based on three-site ion indirect exchange and twisted RKKY interaction models. The electric-field-induced creation of the single skyrmion is predicted.
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