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Diamagnetic respinse of a very simple superconducting granular system

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/0921-4534(91)91490-u
Disciplines
  • Physics

Abstract

Abstract The diamagnetic response of superconducting granular systems is studied by means of a network of Josephson junctions (JJs) and inductances. We study the diamagnetic properties of the simplest possible granular superconductor: a three-grain system which reduces to a superconducting loop closed by three JJs. We numerically determine: the irreversibility line of the system in the H vs T plane and the temperature dependent lower threshold field Hgc1(T). In addition, we remark that the metastable shielding states realized above a thermal activation line in the H vs T diagram decay in experimentally detectable times toward thermodynamic equilibrium. Finally, we mention how this simple model can be extended to more complex systems.

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