SUPERPARAMAGNETISM IN MELT-SPUN CUCO GRANULAR SAMPLES

被引：60

作者：

HICKEY, BJ

HOWSON, MA

MUSA, SO

TOMKA, GJ

RAINFORD, BD

WISER, N

机构：

[1] UNIV SOUTHAMPTON,DEPT PHYS,SOUTHAMPTON SO17 1BJ,HANTS,ENGLAND

[2] BAR ILAN UNIV,IL-52900 RAMAT GAN,ISRAEL

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1995年 / 147卷 / 03期

关键词：

D O I：

10.1016/0304-8853(95)00068-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the magnetic properties of a melt-spun granular sample of Cu87Co13. The Cu matrix contains very fine particles of Co, having a bimodal distribution of sizes: 'larger' particles (similar to 300 Angstrom) and very much smaller particles (< 15 Angstrom) with the latter exhibiting superparamagnetism. The magnetisation data indicate a spread of sizes for the smaller superparamagnetic particles, ranging from individual Co atoms up to clusters of more than 100 atoms of Co. Assuming a simple distribution of particle sizes, we calculated the magnetic field dependence of the magnetisation of the superparamagnetic particles and find excellent agreement with experiment.

引用

页码：253 / 259

页数：7

共 30 条

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