Thermal expansion of orthorhombic and tetragonal phases of the high T c superconductors RE1Ba2Cu3O y (RE=Y, Gd, Dy)

O. M. Prakash, Ashok Rao, O. Prakash, P. N. Dheer

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Abstract

Measurements of the coefficient of linear thermal expansion α have been carried out for the orthorhombic and tetragonal phases of RE1Ba2Cu3O y (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, T c. 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.

Original languageEnglish
Pages (from-to)421-428
Number of pages8
JournalPramana
Volume41
Issue number5
DOIs
Publication statusPublished - 01-11-1993

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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