Synthesis,Mössbauer studies and superconductivity of substituted Bi 2201 phase |
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| Authors: | S Azdad O Gorochov J L Dormann H Pankowska R Suryanarayanan S Sayouri |
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| Institution: | (1) Lab. de Magnétisme et Matériaux Magnétiques, CNRS, 92195 Meudon Cedex, France;(2) Lab. de Physique du Solide, CNRS, 92195 Meudon Cedex, France |
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| Abstract: | We report X-ray diffraction, resistivity and Mössbauer studies on several substituted 2201 Bi cuprates, Bi2Sr2Cu1?xFexOy(O≤x≤1) and Bi2Sr1.6La0.4Cu1?xFexOy and Bi1.6Pb0.4Sr1.6La0.4Cu1?xFexOy (O≤x≤0.04). The first series is not superconducting and a new phase appears for x=1. For La substituted samples, Tc increases up to 35K and decreases strongly with x. All Mössbauer spectra were fitted well with four quadrupole doublets, with relative population depending on samples. |
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