Crystal structure and valency properties of superconducting phases of Ba(Pb, Bi, Sb)O3 perovskites

Bente, K., Blum, W., Gaebel, R., Pebler, J. and Schmid-Beurmann, P. (1992) Crystal structure and valency properties of superconducting phases of Ba(Pb, Bi, Sb)O3 perovskites Physica C: Superconductivity, 202 (3-4). pp. 379-384. DOI 10.1016/0921-4534(92)90183-d.

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Abstract

At 800-850°C in air the Ba(Sb, Bi, Pb)O3 system is pseudo-ternary showing an extended solid solution series in the inner part. In the binary section between the two superconducting perovskites BaPb0.75Bi0.25O3 and BaPb0.75Sb0.25O3 an increasing Sb-content is correlated with a decreasing Tc and a transition from monoclinic to tetragonal symmetry. A single crystal study of a BaPb0.70Sb0.20Bi0.05O3 crystal showed that solid solution members with lower BaPbO3-content than those of the BaPb0.75(Sb, Bi)O3 intersection become cubic. Valency investigations on Sb in BaPb0.75(Bi, Sb)0.25O3 and BaPb0.75Sb0.25O3 by 121Sb-Mössbauer spectroscopy confirmed the valency of Sb to be 5+ independently of composition.

Document Type: Article
Research affiliation: Kiel University
Refereed: No
DOI etc.: 10.1016/0921-4534(92)90183-d
ISSN: 0921-4534
Date Deposited: 02 Feb 2012 09:28
Last Modified: 08 Oct 2012 07:33
URI: http://eprints.uni-kiel.de/id/eprint/15502

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