Effect of electron irradiation on vortex dynamics in YBa2Cu3O7δ single crystals

A. V. Bondarenko, A. A. Prodan, Yu. T. Petrusenko, V. N. Borisenko, F. Dworschak, and U. Dedek
Phys. Rev. B 64, 092513 – Published 15 August 2001
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Abstract

We report on the drastic change of vortex dynamics with the increase of quenched disorder: for rather weak disorder we found a single-vortex creep regime, which we attribute to a Bragg-glass phase, while for enhanced disorder we found an increase of both the depinning current and activation energy with magnetic field, which we attribute to the entangled vortex phase. We also found that the introduction of additional defects always increases the depinning current, but it increases activation energy only for elastic vortex creep, while it decreases activation energy for plastic vortex creep.

  • Received 21 December 2000

DOI:https://doi.org/10.1103/PhysRevB.64.092513

©2001 American Physical Society

Authors & Affiliations

A. V. Bondarenko* and A. A. Prodan

  • Karazin Kharkov National University, Physical Department, Svobody Square 4, 61077 Kharkov, Ukraine

Yu. T. Petrusenko and V. N. Borisenko

  • National Science Center, Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine

F. Dworschak and U. Dedek

  • Institut fur Festkörperforschung Forschungszentrum, Jülich GmbH, D-52425 Jülich, Germany

  • *Email address: Aleksander.V.Bondarenko@univer.kharkov.ua

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Issue

Vol. 64, Iss. 9 — 1 September 2001

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