Effect of Co and Cr substitution on low‐temperature resistivity minimum of amorphous Fe75Si15B10
作者:
G. Venugopal Rao,
Anil K. Bhatnagar,
期刊:
AIP Conference Proceedings
(AIP Available online 1992)
卷期:
Volume 286,
issue 1
页码: 321-323
ISSN:0094-243X
年代: 1992
DOI:10.1063/1.44708
出版商: AIP
数据来源: AIP
摘要:
High precision four terminal dc electrical resistivity (&rgr;) measurements are carried out on amorphous Fe75−xMxSi15B10(M= Co, Cr; 0 ≤x≤ 9)alloys in the temperature ranges 1.5≤T≤300 K and 77≤T≤400 K for Co and Cr substituted samples, respectively. For both kind of samples studied, the temperature dependence of resistivity shows a minimum (&rgr;min) at a temperatureTmin×Tminvalue for amorphous Fe75Si15B10alloy is 20 K and it does not get affected with Co substitution whereas it increases drastically to high temperatures with the same amount of Cr substitution. &rgr; shows a logarithmic temperature dependence for temperatures less thanTmin. AboveTmin , &rgr; shows quadratic temperature dependence. An indirect evidence for the magnetic contribution to total resistivity is presented by an elaborate resistivity data analysis.
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