LARGE FINITE-SIZE EFFECT OF GIANT MAGNETORESISTANCE IN MAGNETIC GRANULAR THIN-FILMS
LARGE FINITE-SIZE EFFECT OF GIANT MAGNETORESISTANCE IN MAGNETIC GRANULAR THIN-FILMS
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DOI：
10.1103/physrevb.51.5863
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发表时间：
1995-03-01
影响因子：
3.7
通讯作者：
XIAO, G
中科院分区：
文献类型：
--
作者：
WANG, JQ;XIAO, G
在不同厚度的Co20Ag80和Fe20Ag80颗粒薄膜中观察到了巨磁电阻(GMR)和反常霍尔效应(EHE)的有限尺寸效应。当厚度接近零时，GMR趋近于零。巨磁电阻的厚度依赖关系可以用尺寸限制效应和大的表面诱导自旋翻转截面相耦合来解释。EHE与GMR表现出很强的相关性，这可能是由于表面诱导的自旋-轨道相互作用所致。
We have observed a finite-size effect of giant magnetoresistance (GMR) and extraordinary Hall effect (EHE) in Co 20 Ag 80 and Fe 20 Ag 80 granular thin films of varying thickness. The GMR approaches zero as the thicknness approaches zero. The thickness dependence of GMR can be explained by a dimensional-confinement effect coupled with a large surface-induced spin-flipping cross section. The EHE exhibits a strong correlation with GMR, which is likely due to the surface-induced spin-orbit interaction.