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A study of the d.c. susceptibility of granular superconductors by means of Josephson-junction array models

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Il Nuovo Cimento D

Summary

The field-cooled d.c. susceptibility of granular superconductors is studied by means of simple Josephson-junction array models. It is shown that a paramagnetic behaviour after field cooling for these systems, for certain ranges of the applied field, is a natural consequence of their topological structure and of the presence of weak superconducting coupling between grains. In this way, the recently detected positive field-cooled d.c. susceptibility is interpreted by means of a traditional Josephson-junction network approach.

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Authors and Affiliations

  1. Dipartimento di Fisica, Università di Salerno, 84081, Baronissi (SA), Italy

    P. Caputo, R. De Luca, U. Gambardella & S. Pace

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  1. P. Caputo
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  2. R. De Luca
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  3. U. Gambardella
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  4. S. Pace
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Caputo, P., De Luca, R., Gambardella, U. et al. A study of the d.c. susceptibility of granular superconductors by means of Josephson-junction array models. Il Nuovo Cimento D 16, 1851–1856 (1994). https://doi.org/10.1007/BF02462184

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  • DOI: https://doi.org/10.1007/BF02462184

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