期刊
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
卷 209, 期 11, 页码 2273-2276出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201228341
关键词
oxychalcogenides; superconductivity; thermoelectricity
资金
- Triangle de la Physique [STP 2008-095T]
- International Cooperation Department of Universite Paris-Sud XI
- Agence Nationale de la Recherche [ANR 2011 JS08 012 01]
The discovery of a 26K superconductivity in the tetragonal iron-based pnictide LaFeAsO1-xFx (x = 0.05-0.12) has stimulated a tremendous search for superconductivity in a wide class of materials with similar structure. Beside superconductivity, promising thermoelectric properties have been discovered in this family in the cryogenic temperature range and in the p-type BiCuSeO system around 400-600 degrees C. In this paper, we report on the effect of various substitutions on the low temperature properties of this system. Whatever the substitution, all samples revealed p-type, and no superconductivity was observed. Moreover, although some of these compounds exhibit very promising thermoelectric properties above room temperature, this is not the case in the low temperature range. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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