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Temperature Dependence of the Electrical Resistivity of Amorphous Co80−xErxB20 Alloys: Localization and Electron–Electron Interaction Effects

Authors
  • Khatami, M.1
  • Omari, L. H.2
  • Eazizayene, N.1
  • Lassri, H.2
  • 1 Hassan II University of Casablanca, Laboratory of Physics of High Energy and Condensed Matter, Faculty of Sciences Ain-Chock, Casablanca, Morocco , Casablanca (Morocco)
  • 2 Hassan II University of Casablanca, Laboratory of Materials Physics, Microelectronics, Automatic and Thermal, Faculty of Sciences Ain-Chock, Casablanca, Morocco , Casablanca (Morocco)
Type
Published Article
Journal
Journal of Low Temperature Physics
Publisher
Springer US
Publication Date
Feb 25, 2019
Volume
195
Issue
1-2
Pages
211–220
Identifiers
DOI: 10.1007/s10909-019-02156-z
Source
Springer Nature
Keywords
License
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Abstract

The amorphous Co80−xErxB20 alloys with x = 0, 3.9, 5.5 and 8.6% have been prepared by melt spinning in pure argon atmosphere. The electrical resistivity has been measured over the temperature range from 4.2 to 300 K. All investigated amorphous alloys exhibit a logarithmic resistivity versus temperature below the temperature of the resistivity minimum Tmin. In addition, the resistivity shows a quadratic temperature behavior in the temperature range Tmin < T < 77 K. At high temperature, the electrical resistivity was discussed by the extended Ziman theory. For the studied alloys, the composition dependence of the temperature coefficient of electrical resistivity α shows a change in sign related to a structural short-range that is occurring in the composition range 8–9%.

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