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Anisotropy of critical current and flux creep of Pb2Sr2Re1-xCaxCu3O8 + y single crystals with Re = Y, Dy

✍ Scribed by V.V. Metlushko; A.A. Zhukov; V.V. Moshchalkov; V.D. Kuznetsov; M.M. Lukina; V.N. Milov

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 261 KB
Volume: 33
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(93)90060-2

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✦ Synopsis

The dependences of critical current density Jc on magnetic field and temperature were studied for Pb2Sr2Re I _xCaxCu308+v single crystals. For zero field the Jc anisotropy, "ab/'c K =1o qo, decreases slightly from 12 to 9 with temperature. The value of K is found to be independent of B. Two transitions are observed in the magnetic field dependence of the relaxation rate R for B~l~. This behaviour is related to the influence of a surface barrier. The current -voltage characteristics are extracted from the magnetic moment relaxation data.

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