Thermal expansion of orthorhombic and tetragonal phases of the highTc superconductors RE1Ba2Cu3Oy (RE=Y, Gd, Dy)
O M Prakash Ashok Rao O Prakash P N Dheer
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Measurements of the coefficient of linear thermal expansion α have been carried out for the orthorhombic and tetragonal phases of RE1Ba2Cu3Oy(RE=Y, Gd, Dy) compounds using a high resolution capacitance dilatometer in the temperature range 77–300 K. All the superconducting samples exhibit a jump Δα at their respective transition temperatures,Tc. Evidences of, sample-to-sample variation in α values and dependence of Δα on the sample preparation conditions, have been obtained. The non-superconducting samples, in general, exhibit lower values of α possibly because of lowering of oxygen content.
O M Prakash1 Ashok Rao1 O Prakash1 2 P N Dheer1
Volume 97, 2023
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