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Flux cutting in YBa2Cu3O7δ single crystals: Experiment and phenomenological model

D. López, G. Nieva, F. de la Cruz, Henrik Jeldtoft Jensen, and Dominic O’Kane
Phys. Rev. B 50, 9684(R) – Published 1 October 1994
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Abstract

We measured the current-induced loss of vortex correlation in YBa2Cu3O7δ crystals using the pseudo-dc-flux-transformer geometry. We find that the current density Jcut at which the top and bottom voltage drops differ is a linear function of temperature, is independent of pinning, and depends on the thickness of the sample. This thickness dependence strongly suggests that the electrical current flows at the surface of the sample. The observed behavior with temperature, magnetic field, and thickness is described by a phenomenological model.

  • Received 8 August 1994

DOI:https://doi.org/10.1103/PhysRevB.50.9684

©1994 American Physical Society

Authors & Affiliations

D. López, G. Nieva, and F. de la Cruz

  • Comisión Nacional de Energía Atómica, Centro Atómico Bariloche, 8400 S. C. de Bariloche, Argentina

Henrik Jeldtoft Jensen and Dominic O’Kane

  • Department of Mathematics, Imperial College, London SW72BZ, United Kingdom

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Vol. 50, Iss. 13 — 1 October 1994

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