Optical and magneto-optical spectra of magnetic granular alloys
Optical and magneto-optical spectra of magnetic granular alloys
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DOI：
10.1016/s0378-4371(97)00057-5
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发表时间：
1997-07-01
期刊：
影响因子：
3.3
通讯作者：
Shipil, E
中科院分区：
文献类型：
--
作者：
Ganshina, E;Granovsky, A;Shipil, E
本文报道了磁性颗粒膜（Co_（70）Fe_（30））（x）Ag_（1-x），Co_xAg_（1-x），Co_xCu_（1-x）在0.5- 4.0eV入射光能量范围内的光学和磁光（MO）谱的实验和理论研究结果。研究了横向克尔效应几何条件下的分子轨道性质。粒状合金的分子轨道谱与均匀薄膜的分子轨道谱有很大的不同。Kerr信号的幅度和MO谱的轮廓取决于颗粒和基体材料、颗粒的浓度和形状以及退火温度。我们解释得到的光谱的有效介质近似的框架内，使铁磁粒子的浓度和它们的形状的一些结论。
We present the results of the experimental and theoretical investigation of the optical and magneto-optical (MO) spectra of magnetic granular films (Co70Fe3o)(x)Ag1-x, CoxAg1-x, CoxCu1-x in the energy range 0.5-4.0 eV of incident light. The MO properties were investigated in the geometry of transverse Kerr effect. The MO spectra of granular alloys are quite different from the spectra of homogeneous films. The amplitude of Kerr signal and the MO spectra profile depend on the granular and matrix material, the concentration and the shape of the grains and the annealing temperature. We interpret the obtained spectra in the framework of the effective medium approximation that allows to make some conclusions about ferromagnetic particle concentration and their shape.