Improvement of Superconducting Properties of Fe1-xCrxSeyTe1-y Polycrystalline Bulks

A series of Fe 1-x Cr x Se y Te 1-y polycrystalline bulks were prepared using solid-state reaction method, and the effects of Cr content and the ratio of Se to Te on the structure and superconducting properties of these bulks were studied. The surface morphology, structure, and superconducting prope...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2022-11, Vol.35 (11), p.3207-3215
Main Authors: Ke, Shao-dong, Miao, Chao-hang, Liu, Lin-fei, Ye, Jia-chao, Mou, Shao-jing, Zhu, Rong-ji, Li, Yi-jie
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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Summary:A series of Fe 1-x Cr x Se y Te 1-y polycrystalline bulks were prepared using solid-state reaction method, and the effects of Cr content and the ratio of Se to Te on the structure and superconducting properties of these bulks were studied. The surface morphology, structure, and superconducting properties of the samples were measured. The results indicated that the as-grown Fe 0.9 Cr 0.1 Se 0.7 Te 0.3 bulk had the maximum superconducting transition temperature T c of 16.03 K, and the upper critical field of Fe 0.9 Cr 0.1 Se 0.6 Te 0.4 bulk was about 123 T. In addition, we explored the influence of heat treatment on the superconducting properties of the samples. It was found that annealing improved the superconducting properties while re-sintering did not. T c of Fe 0.94 Cr 0.06 Se 0.5 Te 0.5 was improved from 15.54 to 16.23 K after annealing.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-022-06401-7