Specific heat of YBa₂Cu₃O_7-x from 4.2 to 60 K

Abstract

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 of θ _D(0) is determined to be 397 ± 8 K. The variation of θ_D with temperature was calculated in the temperature range 4.2 to 60 K.