GIANT MAGNETORESISTANCE FOR SUPERPARAMAGNETIC PARTICLES - MELT-SPUN GRANULAR CUCO

被引：97

作者：

HICKEY, BJ ^{[1
]}

HOWSON, MA ^{[1
]}

MUSA, SO ^{[1
]}

WISER, N ^{[1
]}

机构：

[1] BAR ILAN UNIV,DEPT PHYS,RAMAT GAN,ISRAEL

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.51.667

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the giant magnetoresistance (GMR) and the magnetization of a melt-spun granular sample of Cu87Co13. The Cu matrix contains very small particles of Co that exhibit superparamagnetism. Although the GMR is due to these small superparamagnetic particles, we find that the GMR does not vary quadratically with the magnetization. This unexpected result is attributed to the presence of a range of sizes for the superparamagnetic particles. Assuming a simple distribution of particle sizes, we calculated the magnetic-field dependence of the GMR and find excellent agreement with experiment. © 1995 The American Physical Society.

引用

页码：667 / 669

页数：3

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