Temperature-dependent pinning of vortices in low-angle grain boundaries in YBa2Cu3O7δ

J. Albrecht
Phys. Rev. B 68, 054508 – Published 6 August 2003
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Abstract

Low-angle grain boundaries with misorientation angles θ<5° in optimally doped thin films of YBa2Cu3O7δ are investigated by magneto-optical imaging. With a numerical inversion scheme of Biot-Savart’s law it is possible to obtain the critical current density across the grain boundary with a spatial resolution of about 5μm. This technique is now applied to determine the temperature dependence of the critical current density across low-angle grain boundaries. The detailed analysis of the temperature dependence shows a crossover in the pinning properties of Abrikosov-Josephson vortices which are located in the grain boundary.

  • Received 16 December 2002

DOI:https://doi.org/10.1103/PhysRevB.68.054508

©2003 American Physical Society

Authors & Affiliations

J. Albrecht

  • Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, D-70569 Stuttgart, Germany
  • Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

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Vol. 68, Iss. 5 — 1 August 2003

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