Exchange coupling in magnetic heterostructures.
Exchange coupling in magnetic heterostructures.
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DOI：
10.1103/physrevb.48.7238
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发表时间：
1993-09
期刊：
影响因子：
--
通讯作者：
M. Stiles
中科院分区：
文献类型：
--
作者：
M. Stiles
许多结构组成的磁性层分离的一个磁间隔层显示振荡交换耦合。这种行为是解释在一个简单的模型，该模型表明，费米面的间隔层材料是负责振荡耦合。振荡耦合的周期由间隔层材料的费米表面的极值生成向量设定。耦合的强度既取决于费米面的几何形状，也取决于从间隔层和磁性层之间的界面散射的电子的反射幅度。为了检验这个模型和相关的模型，计算了大量间隔层材料和界面取向的极值生成矢量和相关的费米面几何因子
Many structures consisting of magnetic layers separated by a nonmagnetic spacer layer show an oscillatory exchange coupling. This behavior is explained in terms of a simple model that shows that the Fermi surface of the spacer-layer material is responsible for the oscillatory coupling. The periods of the oscillatory coupling are set by extremal spanning vectors of the Fermi surface of the spacer-layer material. The strength of the coupling depends both on the geometry of the Fermi surface and on the reflection amplitudes for electrons scattering from the interfaces between the spacer layers and the magnetic layers. To test this and related models, the extremal spanning vectors and the associated Fermi-surface geometrical factors have been calculated for a large set of spacer-layer materials and interface orientations