ROLE OF FINITE MAGNETIC CLUSTERS IN AU-FE ALLOYS NEAR PERCOLATION CONCENTRATION

被引:281
作者
COLES, BR
SARKISSIAN, BVB
TAYLOR, RH
机构
[1] Blackett Laboratory, Imperial College, London
[2] CERL, Leatherhead, Surrey
来源
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1978年 / 37卷 / 04期
关键词
D O I
10.1080/01418637808225792
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Au-Fe alloys have been studied by magnetic measurements of various types in the composition range where ferromagnetism evolves from spin-glass character. The percolation limit identified from the results and other data is 15.5 ± 0.3 at.% Fe. Between this composition and -28%Fe, finite clusters co-exist in significant concentrations with the infinite cluster, and a fairly well-defined temperature observed in the magnetic properties is ascribed to a freezing of these clusters that parallels that of finite clusters in the pre-percolation alloys. Magnetic resonance is observed in alloys with more than about 13% Fe (i.e. in alloys containing large nearest.neighbour clusters) and the temperature dependence of the linewidth correlates with the interpretation given of the magnetization data. © 1978 Taylor & Francis Group, LLC.
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页码:489 / 498
页数:10
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