Effects of SnO on growth and physical properties of BSCCO whiskers

Authors: S. Altin, M. A. Aksan, Y. Balci, M. E. Yakinci

Source: Materials Science and Technology

Publisher: Maney Publishing

Abstract:

Superconductor whiskers doped with SnO have been fabricated by annealing a melt quenched (Bi₂Sn₁)-223 precursor using suitable heat treatment cycles. Approximately 5 μm thick, 90 μm wide and 5 mm long whiskers were fabricated, and their physical, electrical and magnetic properties were investigated. Crystallisation activation energies of glass phase fabricated were calculated to be 390 kJ mol⁻¹ using Kissinger method based on the differential thermal analysis data. The T_c value of the whiskers was found to be 94 K from M-T measurement. The magnetisation of whiskers before superconducting transition increased with decreasing temperature, and after superconducting transition, the magnetisation of whiskers decreased, from positive to negative, due to the diamagnetic nature of superconductivity. The change on magnetisation dependence of applied magnetic fields (M-H) showed that whiskers have paramagnetic-diamagnetic multiphase structure.

Document Type:

DOI: 10.1179/174328409X459347

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