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Inhomogeneous current distribution in wide high-temperature superconducting small-angle grain boundaries

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  • K. Guth
  • V. Born
  • Ch Jooss

Abstract

Using space resolved magneto-optical microscopy we have studied the development of the critical state in high temperature superconducting small-angle grain boundaries in magnetisation experiments. It has been found that with respect to the position in the grain boundary plane this critical state develops in a highly inhomogeneous manner. Towards the centre of the grain boundary there exists a distinct suppression of the inter-granular currents flowing across the grain boundary. A strong correlation between the static (critical current) and the dynamical properties (e.g. electric field or flux-line velocity) of the vortex system inside the grain boundary appears to be the principal mechanism for the observed inhomogeneous current distribution in wide bi-crystalline current bridges. Copyright Springer-Verlag Berlin/Heidelberg 2004

Suggested Citation

  • K. Guth & V. Born & Ch Jooss, 2004. "Inhomogeneous current distribution in wide high-temperature superconducting small-angle grain boundaries," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 42(2), pages 239-245, November.
    • Handle: RePEc:spr:eurphb:v:42:y:2004:i:2:p:239-245
    DOI: 10.1140/epjb/e2004-00384-5
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