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Scientific article
English

Thermodynamic and kinetic studies of the phase transitions in Tl2Ba2CuO6±x

Published inJournal of Alloys and Compounds, vol. 215, no. 1-2, p. 135-140
Publication date1994
Abstract

We present a kinetic and thermodynamic analysis of the phase transitions in stoichiometric Tl2Ba2CuO6 samples prepared under a pressure of 100 bar. We have found a first-order transformation which maintains the orthorhombic structure from high pressure to 1 bar. The as-prepared tetragonal structure in an inert gas converts to orthorhombic symmetry when annealed in an oxygen flux. The activation energies have been deduced from a dynamic analysis of weight losses during the phase changes. The enthalpy and entropy for the formation of oxygen vacancies have been determined.

Citation (ISO format)
JORDA, Jean-Louis et al. Thermodynamic and kinetic studies of the phase transitions in Tl<sub>2</sub>Ba<sub>2</sub>CuO<sub>6±x</sub>. In: Journal of Alloys and Compounds, 1994, vol. 215, n° 1-2, p. 135–140. doi: 10.1016/0925-8388(94)90830-3
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ISSN of the journal0925-8388
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