微磁自旋波模拟中的网格尺寸和阻尼边缘效应
Mesh Size and Damped Edge Effects in Micromagnetic Spin Wave Simulation
摘要：
我们已经研究了自旋波色散的有限元微磁模拟中使用的网格的特性的依赖关系。它示出的色散曲线有一个截止的频率，这是分析预测。频率取决于用于模拟的平均网格长度。在此基础上，提出了一种有效获得色散关系的方法。在另一项研究中，通过在器件中引入高阻尼边缘来吸收自旋波反射。然而，阻尼参数的突然变化会引起反射。我们比较阻尼配置文件，并确定一个指数阻尼配置文件，导致显着减少反射。
英文摘要：
We have studied the dependence of spin wave dispersion on the characteristics of the mesh used in a finite element micromagnetic simulation. It is shown that the dispersion curve has a cut off at a frequency which is analytically predictable. The frequency depends on the average mesh length used for the simulation. Based on this, a recipe to effectively obtain the dispersion relation has been suggested. In a separate study, spin wave reflections are absorbed by introducing highly damped edges in the device. However, an abrupt change in the damping parameter causes reflections. We compare damping profiles and identify an exponential damping profile as causing significantly less reflections.
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