Magnetic properties and structure of (Co-alloy)-SiO/sub 2/ granular films
Magnetic properties and structure of (Co-alloy)-SiO/sub 2/ granular films
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(Co合金)-SiO/sub 2/颗粒薄膜的磁性能和结构
DOI：
10.1109/20.539181
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发表时间：
1996
影响因子：
2.1
通讯作者：
M. Shinohara
中科院分区：
文献类型：
--
作者：
I. Kaitsu;A. Inomata;J. Okamoto;M. Shinohara
采用复合靶射频溅射和高真空退火的方法制备了（Co合金）-SiO/sub 2/颗粒膜。薄膜的结晶度与退火温度、薄膜中钴合金的体积分数以及其他添加元素有关。我们发现，（Co/sub 85/Pt/sub 15/）/sub 83/-（SiO/sub 2/）/sub 17/颗粒膜（Co/sub 85/Pt/sub 15/：64体积%）在室温下表现出约1600 Oe的矫顽力。用原子力显微镜（AFM）测得颗粒直径约为50 nm。X射线衍射分析表明，大部分薄膜的Co合金晶粒为面心立方结构。从Henkel图分析，CoPt颗粒之间的磁交换相互作用被发现是弱的。
We fabricated (Co-alloy)-SiO/sub 2/ granular films by rf-sputtering with composite target and annealing in a high vacuum environment. The coercivity of the films depended on annealing temperature, the Co-alloy's volume fraction in the film, and other added elements to cobalt. We found that a (Co/sub 85/Pt/sub 15/)/sub 83/-(SiO/sub 2/)/sub 17/ granular film (Co/sub 85/Pt/sub 15/: 64 vol.%) exhibited about 1600 Oe of coercivity at room temperature. The grains diameter was about 50 nm measured by AFM. X-ray diffraction patterns showed that the Co-alloy grains of most films had an fcc-phase structure. From Henkel-plot analysis, the magnetic exchange interaction between the CoPt grains was found to be weak.