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arXiv 1202.6464cond-mat.mes-hall
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面内磁场作用下磁性纳米盘中的自旋波模

Spin wave modes in magnetic nanodisks under in-plane magnetic field

T. Kaneko, S. M. Noh, K. Miyake, M. Sahashi, H. Imamura

摘要:

采用微磁学模拟方法,系统研究了面内磁场作用下坡莫合金(Py)纳米圆盘中自旋波模的尺寸依赖性。结果表明,随着圆盘直径的增大,后向模的共振频率减小,而均匀模的共振频率增大。均匀模式和后向模式的谐振频率的避免交叉出现在谐振频率的尺寸依赖性的曲线图中,并且后向模式变成大纳米盘的所谓的“边缘模式”。

英文摘要:

The size dependence of spin wave modes in a circular Permalloy (Py) nanodisk under an in-plane magnetic field is systematically studied by using micromagnetics simulations. We show that as the disk diameter is increased, the resonance frequency of the backward mode deceases while that of the uniform mode increases. The avoided crossing of resonance frequencies of the uniform mode and the backward mode appears in the plot of the size dependence of resonance frequencies and the backward mode turns into the so-called "edge mode" for large nanodisks.

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