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Micromagnetic Evaluation of Size Effects on the Critical Curves of Synthetic Antiferromagnetic Structures

机译:尺寸对合成反铁磁结构临界曲线的影响的微磁评估

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摘要

In many applications in which synthetic antiferromagnetic (SAF) structures are used, the most intricate problem is to design a magnetic field sequence to safely switch the AF coupled magnetic moments. In this paper, we analyze the switching of a SAF structure under a magnetic field pulse using the concept of critical curve (CC). To observe the size effects on the CCs, we have used a full micromagnetic simulation based on Magpar software package. The results have been compared with a simulation of the CCs with a simplified model using two macrospins coupled antiferromagnetically with the dynamics described by the Landau-Lifshitz–Gilbert equation. The differences between the two ways of simulation the same switching process are presented and discussed.
机译:在使用合成反铁磁(SAF)结构的许多应用中,最复杂的问题是设计磁场序列以安全地切换AF耦合磁矩。在本文中,我们使用临界曲线(CC)的概念分析了在磁场脉冲下SAF结构的切换。为了观察尺寸对CC的影响,我们使用了基于Magpar软件包的完整的微磁仿真。将结果与简化CC的模拟进行了比较,该模型使用两个反铁磁耦​​合的宏观自旋与Landau-Lifshitz-Gilbert方程描述的动力学进行了简化。介绍并讨论了两种模拟相同开关过程的方式之间的差异。

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