Dipolar induced, spatially localized resonance in magnetic antidot arrays
Dipolar induced, spatially localized resonance in magnetic antidot arrays
复制标题
磁性解点阵列中的偶极感应空间局部共振
DOI：
10.1063/1.1625104
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发表时间：
2003
影响因子：
4
通讯作者：
G. Mankey
中科院分区：
文献类型：
--
作者：
Chengtao Yu;M. Pechan;G. Mankey
在光刻法制备的坡莫合金薄膜中，偶极子诱导的空间局域铁磁共振（35 GHz）在微米尺寸的反点阵列中被观察到。所有正方形（3 μm×3 μm）和矩形（3 μm×4、5和7 μm）阵列样品均呈现双共振，每个共振均具有单轴面内各向异性。有趣的是，两个共振的简单轴在所有情况下都是正交的。对于其中一种共振，诱导偶极各向异性的大小随着矩形宽高比的增加而减小，而对于另一种共振，诱导偶极各向异性的大小基本保持不变。微磁模拟表明，这两个共振峰是偶极子场分布的结果，产生了两个具有明显不同退磁场模式的区域。
Dipole induced, spatially localized ferromagnetic resonances (at 35 GHz) are observed in micron-sized antidot arrays in permalloy films fabricated with photolithography. All square (3 μm×3 μm) and rectangular (3 μm×4, 5, and 7 μm) array samples exhibit double resonances, with each resonance possessing uniaxial in-plane anisotropy. Interestingly, the easy axes of the two resonances are orthogonal in all cases. The magnitude of the induced dipolar anisotropy decreases with increasing rectangular aspect ratio for one of the resonances, but remains essentially constant for the other. Micromagnetic simulations reveal that the two resonance peaks are the consequence of a dipole field distribution producing two areas with distinctly different demagnetizing field patterns.