Giant Magnetoresistance of Metal-Nonmetal films with Nano-Granular Structure Prepared by Tandem Deposition Method.
Giant Magnetoresistance of Metal-Nonmetal films with Nano-Granular Structure Prepared by Tandem Deposition Method.
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串联沉积法制备纳米颗粒结构金属-非金属薄膜的巨磁阻。
DOI：
10.3379/jmsjmag.22.581
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
H. Fujimori
中科院分区：
文献类型：
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作者：
N. Kobayashi;S. Ohnuma;T. Masumoto;H. Fujimori
研究了串联沉积法制备的(Fe，Co)/Al_2O_3薄膜的巨磁电阻效应与纳米颗粒结构的关系。通过改变基片夹持器的转速来控制薄膜的结构。通过这种方式，薄膜中金属颗粒的大小与薄膜成分无关地改变。对于Fe/Al_2O_3薄膜，随着衬底支架转速的提高，金属颗粒的平均直径从2.5 nm减小到1.5 nm。另一方面，金属颗粒之间的Al_2O_3边界宽度估计为0.5-1 nm。磁化率随金属颗粒尺寸的减小而增大。讨论了所谓的库仑阻塞效应，即颗粒大小对磁流变率的影响。
The relationship between the giant magnetoresistance (GMR) and the nano-granular structure of (Fe, Co)/Al2O3 films prepared by a tandem deposition method was examined. The structure of the films was controlled by changing the rotation speed of a substrate holder. In this way, the size of the metallic granules in the film was changed independently of the film composition. In the case of Fe/Al2O3 films, the average diameter of a metallic granule decreased from 2.5 to 1.5 nm with an increase in the rotation speed of the substrate holder. On the other hand, the width of the Al oxide boundary among metallic granules was estimated to be about 0.5-1 nm. The MR ratio increased with a decrease in the size of the metal granules. So-called coulomb blockade effect is discussed the influence of the granule size on the MR ratio.