High electrical resistivity and permeability of soft magnetic granular alloys
High electrical resistivity and permeability of soft magnetic granular alloys
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软磁颗粒合金的高电阻率和磁导率
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
S. Ohnuma
中科院分区：
文献类型：
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作者：
H. Fujimori;S. Mitani;T. Ikeda;S. Ohnuma
研究了溅射CoFeB-O和CoAl-O颗粒合金薄膜的电阻率和磁性能。在氧含量较高的薄膜中观察到用exp（/spl α/T/sup-1/2/）描述的隧穿跳跃电导。的系数/spl α/，成比例的隧道激活能的根，是小于由金属和非金属颗粒的混合物组成的类似的颗粒系统。在这些膜的磁导率的频率依赖性是显着平坦的高频率（/spl sim/50 MHz），虽然损失项略大于由Landau-Lifshitz方程使用所观察到的高磁导率计算。>
The electrical resistivity and magnetic properties were investigated on sputtered CoFeB-O and CoAl-O granular alloy thin films, which are considered to be new-type of magnetic thin film useful in the very high frequency region. A tunnel-hopping conductivity described by exp(/spl alpha/T/sup -1/2/) was observed in films with higher O content. The coefficient /spl alpha/, proportional to the root of tunnel-activation energy, was smaller than that of similar granular systems composed of a mixture of metallic and non-metallic particles. The frequency dependence of the permeabilities in these films was remarkably flat up to high frequencies (/spl sim/50 MHz), although the loss terms were slightly larger than those calculated by the Landau-Lifshitz equation using the observed high resistivities. >