Simulation and study of the percolation effect in the magnetic susceptibility of high-temperature superconducting composites

E. Bruneel, A. J. Ramirez-Cuesta, I. Van Driessche, and S. Hoste
Phys. Rev. B 61, 9176 – Published 1 April 2000
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Abstract

A simple model is proposed to analyze the relationship between susceptibility and composition in superconducting composites. The model is based on a random distribution of superconducting and nonsuperconducting phases and on the occurrence of shielding when a nonsuperconducting area is encapsulated by superconducting material. A three-dimensional simulation based on percolation theory is in agreement with our experimental data on a series of MgO-superconductor composites. A predicted percolation effect was observed and a maximum in shielding efficiency was determined.

  • Received 18 October 1999

DOI:https://doi.org/10.1103/PhysRevB.61.9176

©2000 American Physical Society

Authors & Affiliations

E. Bruneel*

  • Department of Inorganic and Physical Chemistry, Solid State and Superconducting Materials Division, University of Gent, Krijgslaan 281 (S3), B-9000 Ghent, Belgium

A. J. Ramirez-Cuesta

  • Department of Chemistry, University of Reading Whiteknights, P.O. Box 224, Reading RG6 6AD, United Kingdom

I. Van Driessche and S. Hoste

  • Department of Inorganic and Physical Chemistry, Solid State and Superconducting Materials Division, University of Gent, Krijgslaan 281 (S3), B-9000 Ghent, Belgium

  • *Electronic address: els.bruneel@rug.ac.be

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Vol. 61, Iss. 13 — 1 April 2000

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