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Critical Current Anisotropy of Tl-1223 Superconductors

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Abstract

A comparative study of the critical current anisotropy of Tl-1223 conductors manufactured by different techniques, prepared from different compositions and originating from different research laboratories is presented and discussed. For highly oriented layers, with the magnetic field (B) parallel to the ab plane, the normalised critical current density (j) versus magnetic field characteristic shows very little drop of j value due to the intrinsic properties of the Tl-1223 phase, while all powder-in-tube conductors show a rapid drop of j value in fields as low as 10 mT. For all powder-in-tube conductors the anisotropy coefficient k shows a very pronounced minima at fields up to 30 mT followed by a monotonic decrease of anisotropy with increase of the magnetic field. This is due to poor grain alignment and a demagnetising effect in the powder-in-tube Tl-1223 tapes.

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Author notes

  1. B. A. Glowacki

    Present address: Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK

Authors and Affiliations

  1. IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge, CB3 OHE, UK

    B. A. Glowacki, M. Ciszek, S. Wu & W. Y. Liang

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  1. B. A. Glowacki
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  2. M. Ciszek
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  3. S. Wu
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  4. W. Y. Liang
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Glowacki, B.A., Ciszek, M., Wu, S. et al. Critical Current Anisotropy of Tl-1223 Superconductors. Journal of Superconductivity 11, 21–22 (1998). https://doi.org/10.1023/A:1022605123242

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  • DOI: https://doi.org/10.1023/A:1022605123242

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