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Title: Kondo effect in Co{sub x}Cu{sub 1-x} granular alloys prepared by chemical reduction method

Nanostructured CoCu granular alloys Co{sub x}Cu{sub 1-x} (x ≤ 0.3) have been prepared by chemical reduction method using NaBH{sub 4} as a reducing agent. Electronic transport properties are studied in the temperature range 4-300 K. Resistance exhibits a metallic behavior below room temperature and draws a minimum near 20 K in all the samples except in Co{sub 0.3}Cu{sub 0.7}. This low temperature resistivity minimum diminishes with applied magnetic field. There is also a logarithmic temperature dependence of resistivity at temperatures below 20 K. This phenomenon indicates a Kondo-like scattering mechanism involving magnetic Co impurity spin clusters in Cu host.
Authors:
; ;  [1]
  1. CMP Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata-700064 (India)
Publication Date:
OSTI Identifier:
22490589
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT ALLOYS; COPPER BASE ALLOYS; ELECTRIC CONDUCTIVITY; IMPURITIES; KONDO EFFECT; MAGNETIC FIELDS; NANOSTRUCTURES; REDUCING AGENTS; REDUCTION; SCATTERING; SODIUM BORIDES; SODIUM HYDRIDES; SPIN; TEMPERATURE DEPENDENCE