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High temperature superconductors; Y-Ba-Cu-O system; specific heat

The specific heat of superconducting oxide compound, YBa₂Cu₃O_{7 −x}, is studied using a quasi-adiabatic calorimeter from 4.2 to 60 K. The analysis of the specific heat data below 15 K gives a value of 17 mJ/mole K² for the electronic heat capacity coefficient. The value ofθ_D(0) is determined to be 397±8 K. The variation ofθ_D with temperature was calculated in the temperature range 4.2 to 60 K.

N Sankar^{1 2} V Sankaranarayanan¹ R Srinivasan¹ G Rangarajan¹ G V Subba Rao^{1 3}

1. Department of Physics, Indian Institute of Technology, Madras - 600 036, India
2. Systems Engineering Division, National Aeronautical Laboratory, Bangalore - 560 017, India
3. Materials Science Research Centre, Indian Institute of Technology, Madras - 600 036, India

Published

May 1988

Manuscript received

10 February 1988