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Magnetic behavior of weak links in bulk superconducting YBa2Cu3O7−x: Ag composite

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Abstract

The magnetization of a polycrystalline composite YBa2Cu3O7−x :Ag0.1 in the superconducting state is measured in the presence of a small a.c. magnetic field. With increase in field amplitude, the magnetizationM(t) changes its shape from nearly sinusoidal to square-wave like and then to a two-peak structure. A similar behavior of the magnetizationM(t), calculated from the critical-state model with intergranular critical currentJ c =αc[μ(H 0 +¦H¦)]−1 is obtained. A very good fit is found between the theoretical and experimental results, and the parameters of the model are estimated.

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Author notes

  1. A. Mitra

    Present address: MTP Division, NML, 831007, Jamshedpur, India

Authors and Affiliations

  1. Materials Science Center, Indian Institute of Technology, 721302, Kharagpur, India

    D. Sen

  2. Department of Physics and Meteorology, Indian Institute of Technology, 721302, Kharagpur, India

    A. Mitra & S. K. Ghatak

Authors
  1. D. Sen
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  2. A. Mitra
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  3. S. K. Ghatak
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Sen, D., Mitra, A. & Ghatak, S.K. Magnetic behavior of weak links in bulk superconducting YBa2Cu3O7−x: Ag composite. J Supercond 5, 519–525 (1992). https://doi.org/10.1007/BF00618242

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  • DOI: https://doi.org/10.1007/BF00618242

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