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Simulation of vortex-line pinning by defects in the Y-Ba-Cu-O system

Published online by Cambridge University Press:  26 February 2011

R. Jamison
Affiliation:
Department of Materials Science and Mineral Engineering, University of California at Berkeley, CA; and Materials Science Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720.
C. P. Burmester
Affiliation:
Department of Materials Science and Mineral Engineering, University of California at Berkeley, CA; and Materials Science Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720.
L. T. Wille
Affiliation:
Department of Physics, Florida Atlantic University, Boca Raton, FL 33431.
R. Gronsky
Affiliation:
Department of Materials Science and Mineral Engineering, University of California at Berkeley, CA; and Materials Science Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720.
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Abstract

The finite temperature properties of a two-dimensional flux lattice are studied by Monte Carlo simulation, with particular attention to the effects of twin-boundaries. The parameters selected are appropriate for the YBa2Cu3O7 high-temperature superconducting system. The intrinsic properties of the vortex state are investigated by monitoring system evolution at fixed temperature and applied magnetic field. By varying the temperature, the loss of type-II superconductivity via fluxoid lattice melting is also examined. The introduction of model defects induces the creation of metastable and glassy states which reduce overall hexatic order but are found to enhance system resistance to flux-lattice melting.

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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References

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