Manipulation by exchange coupling in layered magnetic structures
Manipulation by exchange coupling in layered magnetic structures
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DOI：
10.1063/1.4864429
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发表时间：
2014-02
影响因子：
3.2
通讯作者：
M. Moskalenko;V. Uzdin;H. Zabel
中科院分区：
文献类型：
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作者：
M. Moskalenko;V. Uzdin;H. Zabel
磁性异质结构中的交换耦合可以通过在界面处引入额外的磁间隔层来改变。磁特性和间隔层厚度决定了整个系统的功能特性。结果表明，具有两个不同软磁层(S1，S2)和一个硬磁层(H)且顺序为S1/S2/h的三层弹簧磁体的磁滞回线面积可以比具有相同软层总厚度的两种双层结构S1/h和S2/h的磁滞回线面积增大。对于亚铁磁性自旋阀，垂直交换偏置效应可以通过界面上非磁性隔离层的厚度来调节，这决定了亚铁磁体之间的交换耦合。一个简单的准一维唯象模型能够描述甚至复杂的层状结构的磁滞回线，并能预测最优的几何参数和磁参数。
Exchange coupling in magnetic heterostructures can be modified via introduction of additional magnetic spacer layers at the interfaces. The magnetic characteristics and the spacer layer thickness determine the functional properties of the whole system. We show that the hysteresis loop area of trilayer spring magnets with two different soft magnetic layers (s1, s2) and one hard magnetic layer (h) with the sequence s1/s2/h can be increased as compared to both bilayer structures s1/h and s2/h with the same total thickness of the soft layers and for definite thickness ratios of the soft layers and their sequences. For ferrimagnetic spin valves, the perpendicular exchange bias effect can be tuned via the thickness of non-magnetic spacer layers at the interface, which determine the exchange coupling between ferrimagnets. A simple quasi one-dimensional phenomenological model is able to describe the magnetic hysteresis of even complex layered structures and to predict optimal geometrical and magnetic parameters o...