Brillouin light scattering investigations of structured permalloy films
Brillouin light scattering investigations of structured permalloy films
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结构化坡莫合金薄膜的布里渊光散射研究
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
F. Carcenac
中科院分区：
文献类型：
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作者：
B. Hillebrands;C. Mathieu;M. Bauer;S. Demokritov;B. Bartenlian;C. Chappert;D. Decanini;F. Rousseaux;F. Carcenac
用布里渊光散射法研究了坡莫合金薄膜中点直径为0.5 ~ 2 μm、周期为1 ~ 4 μm的规则方晶格磁点的静态和自旋波特性。使用x射线光刻和离子束蚀刻对样品进行了结构处理。布里渊光散射光谱揭示了表面和体自旋波模式。考虑到每个单点的退磁系数，可以很好地描述自旋波频率。对于最小点间距为0.1 μm的样品，观察到易轴沿图案对角线方向的四倍平面内磁各向异性，表明点之间存在各向异性耦合。
The static and spin wave properties of regular square lattices of magnetic dots of 0.5–2 μm dot diameter and 1–4 μm periodicity patterned in permalloy films have been investigated by Brillouin light scattering. The samples have been structured using x-ray lithography and ion beam etching. The Brillouin light scattering spectra reveal both surface and bulk spin wave modes. The spin wave frequencies can be well described taking into account the demagnetization factor of each single dot. For the samples with smallest dot separation of 0.1 μm a fourfold in-plane magnetic anisotropy with the easy axis directed along the pattern diagonal is observed, indicating anisotropic coupling between the dots.