Study of the influence of tin substitution on the structural, superconducting and magnetic properties of a high-temperature superconductor of the Eu-123 type

(Investigators: A. Cigáň, A. Dvurečenskij, M. Škrátek, M. Majerová, J. Maňka)

Polycrystalline samples with a nominal composition of EuBa2Cu3-xSnxO7-δ, where x = 0 to 1.5, were prepared by the solid phase reaction method at 1050 ° C in an oxygen atmosphere. Their structural, superconducting and magnetic characteristics were analyzed based on the results of polarizing optical microscopy, XRD and SQUID magnetometric measurements. Increasing tin content reduces the volume of the main superconducting phase. The critical superconducting temperature decreases from 95 K for x = 0 to 82 K for x = 0.7. For higher tin content, the semiconductor tetragonal phase Eu-336 (Eu3Ba3Cu6O14), paramagnetic or diamagnetic Ba-Sn-O phase dominate. The usefulness of measuring ZFC and FC temperature dependences of magnetic characteristics in the study of systems characterized by the simultaneous presence of superconducting and magnetic arrangements and in distinguishing their effects has been demonstrated.

Foreign partner:
• Department of Inorganic and Physical Chemistry, Faculty of Sciences, Ghent University, Belgium.
Related projects:
• VEGA 2/0152/13: Development of SQUID Gradiometric and Susceptometric Methods for Bioapplications Associated with Iron Homeostasis Related
• ASFEU project 26240120019 (CENTE II).
• project AI5 / TT / 1170.

 

Publication:

DVUREČENSKIJ, A. – CIGÁŇ, A. – VAN DRIESSCHE, I. – ŠKRÁTEK, M. – MAJEROVÁ, M. – BRUNEEL, E. – MAŇKA, J. Superconducting and magnetic properties of Sn-doped EuBa2Cu3O7- δ In Acta Physica Polonica A, 2017, vol. 131, no. 4, p. 1045-1047. ISSN 1898-794X. (0.469-IF2016).