Radiation of spin waves by a single micrometer-sized magnetic element
Radiation of spin waves by a single micrometer-sized magnetic element
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DOI：
10.1063/1.1803621
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发表时间：
2004-10-04
影响因子：
4
通讯作者：
Freitas, PP
中科院分区：
文献类型：
--
作者：
Demidov, VE;Demokritov, SO;Freitas, PP
通过微焦点布里渊光散射装置研究了由坡莫合金和部分图案化的CoFe层组成的单个微米尺寸的磁性元件的动态磁特性，该装置允许在亚微米尺度上局部测量磁化动态。结果表明，在磁性元件中激发的量子化自旋波模作为周围磁性膜中自旋波的辐射源。发现不同量子化模式激发的自旋波在远离激发区时，其强度遵循不同的距离定律。(C)2004年，美国物理学会。
Dynamic magnetic properties of a single micrometer-sized magnetic element consisting of a permalloy and a partially patterned CoFe layer separated by an intervening Cu spacer layer have been studied by means of a micro-focus Brillouin light scattering setup, which allows for local measurements of the magnetization dynamics on the submicrometer scale. It is shown that quantized spin-wave modes excited in the magnetic element act as radiation sources for spin waves in the surrounding magnetic film. It is found that the intensities of spin waves excited by different quantized modes follow different distance laws when traveling away from the region of excitation. (C) 2004 American Institute of Physics.