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Title: Low temperature magnetic and electrical transport behavior of Co{sub 58.5}Ga{sub 41.5} alloy

The electrical transport and magnetic properties of Co{sub 58.5}Ga{sub 41.5} binary alloy have been investigated in the temperature range 2-300 K. Analysis of field and temperatures dependence magnetization data suggests a reentrant magnetic behavior with Curie temperature (T{sub C}) ∼90 K. Temperature dependence of resistivity shows large residual resistivity values which is sensitive to the applied magnetic field. The temperature and field dependent resistivity behavior indicates the presence of spin fluctuations at low temperature. Magnetoresistance (MR) of 17 % has been observed at 2 K in 90 kOe field, which follows a power law with exponent varying form 0.5 at low temperature to linear behavior at higher temperature. The temperature variation of magnetization and MR can be understood on the basis of ferromagnetic matrix with finite spin clusters.
Authors:
; ;  [1] ; ;  [2] ;  [3]
  1. Department of Physics, Indian Institute of Technology Madras, Chennai-600036 (India)
  2. Department of Condensed Matter Physics and Material Sciences, TIFR, Colaba, Mumbai-400005 (India)
  3. Department of Physical Sciences, Bhabha Atomic Research Centre, Trombay, Mumbai-400085 (India)
Publication Date:
OSTI Identifier:
22490498
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; BINARY ALLOY SYSTEMS; COBALT ALLOYS; CURIE POINT; FERROMAGNETIC MATERIALS; FERROMAGNETISM; FLUCTUATIONS; GALLIUM ALLOYS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; MAGNETORESISTANCE; MATRIX MATERIALS; SPIN; TEMPERATURE DEPENDENCE