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Influence of synthesis route on structural phase transition in YBa2−xLaxCu3Oy (0<x<0.20)

Kini, NS and Umarji, AM (2001) Influence of synthesis route on structural phase transition in YBa2−xLaxCu3Oy (0<x<0.20). In: Physica C: Superconductivity, 349 (3-4). 257 -264.

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Official URL: http://dx.doi.org/10.1016/S0921-4534(00)01547-1

Abstract

The compounds YBa2−xLaxCu3Oy, with compositions (0<x<0.20), have been synthesised by nitrate decomposition method and solid-state reaction and characterised. Structural transition from orthorhombic to tetragonal phase occurred at (0.15<x<0.20) in compounds synthesised by nitrate decomposition method, whereas no transition was observed in compounds synthesised by solid-state reaction for x values up to 0.20. The ternary phase formation temperature is influenced by the starting materials used and ionic size considerations. These factors are shown to determine the composition at which the changeover from orthorhombic (superconducting) to tetragonal (non-superconducting) phase transition (O–T transition) occurs.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Substitution effects;Structural transition;Synthesis route YBa2±xLaxCu3Oy.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 09 Nov 2011 10:08
Last Modified: 09 Nov 2011 10:08
URI: http://eprints.iisc.ernet.in/id/eprint/39554

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