Transport and Magnetic AC Losses in Ag/Tl-1223 Tape and the Effect of Mechanical Damage |
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| Authors: | M. Ciszek B.A. Glowacki A.M. Campbell S.P. Ashworth W.Y. Liang R.E. Gladyshevskii |
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| Affiliation: | (1) IRC in Superconductivity, University of Cambridge, Cambridge, CB3 OHE, UK;(2) Present address: Department of Science and Metallurgy, Cambridge University, Pembroke Street, Cambridge, CB2 3QZ, UK;(3) Département de Physique de la Matière Condensée, Université de Genève, 24 quai Ernest Ansermet, CH-1211 Genève 4, Switzerland |
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| Abstract: | In this paper we present the results of AC loss measurements on silver clad monocore tapes of Tl-1223 prepared by the powder-in-tube method. Losses arising from an external AC magnetic field are compared with those generated by AC transport currents (self-field losses). Critical current densities are derived from magnetic loss data and compared with those measured by the four point transport method. It was found that mechanically induced stresses (introduced by bending) only have a significant effect on the transport losses, via the critical current degradation. Such changes are not seen in measured magnetic losses, which are independent of mechanical stress, and remain unchanged, at least in the stress range used in our experiment. |
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| Keywords: | HTc superconductors thallium tapes AC losses critical currents |
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