Effect of Nb Doping on the Structure and Superconducting Properties of FeSe0.4Te0.6

FeSe 1− x Te x superconductor has a relatively simple crystal structure and a high superconducting transition temperature in bulk form at ambient pressure, which gives it great application potential. In this study, Nb is selected to partially replace Fe in FeSe 0.4 Te 0.6 and a series of Fe 1− x Nb...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2023-12, Vol.36 (10-12), p.1821-1827
Main Authors: Zhang, Shiqing, Cui, Yajing, Wen, Zhiwei, Li, Shulong, Zhao, Yong, Chen, Yongliang
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:FeSe 1− x Te x superconductor has a relatively simple crystal structure and a high superconducting transition temperature in bulk form at ambient pressure, which gives it great application potential. In this study, Nb is selected to partially replace Fe in FeSe 0.4 Te 0.6 and a series of Fe 1− x Nb x Se 0.4 Te 0.6 single crystals with x  = 0, 0.01, 0.03, 0.06, and 0.1 were synthesized using the self-flux. The crystal structure and superconductivity are characterized by XRD and magnetization measurements. The fish-tail peak effect was observed in samples with x  = 0, 0.01, and 0.03. The critical current density of the three samples with x  = 0, 0.01, and 0.03 is estimated by using the Bean model. According to the Dew-Hughes model, the effect of Nb doping on the magnetic flux pinning behavior of FeSe 0.4 Te 0.6 is also investigated.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-023-06626-0