The effect of particle size and surface-to-volume ratio distribution on giant magnetoresistance (GMR) in melt-spun Cu-Co alloys

被引：31

作者：

Kuzminski, M

Slawska-Waniewska, A

Lachowicz, HK

Knobel, M

机构：

[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

[2] UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 205卷 / 01期

关键词：

giant magnetoresistance; superparamagnetism; granular alloys;

D O I：

10.1016/S0304-8853(99)00465-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Giant magnetoresistance (GMR), magnetization and structure of granular Cu90Co10 alloy were investigated. The annealed sample is inhomogeneous with respect to the Go-particle sizes and interparticles distances and, therefore, not all particles behave superparamagnetically. The ob served deviation from the expected theoretically quadratic dependence of GMR on magnetization can be attributed to differentiated surface-to-volume ratio of superparamagnetic particles as well as to the presence of a small amount of ferromagnetic phase which is created by relatively large Go-rich regions. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：7 / 13

页数：7

共 24 条

[1] Magnetic properties and giant magnetoresistance of melt-spun granular Cu-100-x-Co-x alloys [J].