Voltage‐current characteristics of Bi‐2223 superconducting tape near T c  under γ irradiation | Zendy

Kayed T. S. | Zendy; Ercan I. | Zendy

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Voltage‐current characteristics of Bi‐2223 superconducting tape near T c under γ irradiation

Author(s) -

Kayed T. S.,

Ercan I.

Publication year - 2004

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.200310179

Subject(s) - superconductivity , irradiation , condensed matter physics , magnetic field , critical current , materials science , voltage , atmospheric temperature range , current (fluid) , analytical chemistry (journal) , transition temperature , chemistry , physics , thermodynamics , nuclear physics , chromatography , quantum mechanics

Voltage‐current characteristics at four different applied magnetic fields (7, 20, 30, and 40 mT) of Bi 2 Sr 2 Ca 2 Cu 3 O x superconducting tape were measured in the temperature range from 100 to 115 K. They were also measured at zero magnetic field before and after γ irradiations up to 10 MRad at different temperatures just below the critical temperature. The data were fitted to a power law expression V = I β(T) in which the exponential parameter β under 20 mT field and after irradiation is found to fluctuate around three and then drops to unity near the critical temperature which may be interpreted as a sign of Kosterlitz‐Thouless transition. The electrical properties of the tape were found to be very sensitive to γ irradiation where most of the changes take place in low γ doses. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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