POLARIZATION EFFECTS INDUCED BY A MAGNETIC FIELD IN INTRINSICALLY GRANULAR SUPERCONDUCTORS
Sergeenkov S.

Received: June 3, 2005

PACS: 74.25.Ha, 74.50.+r, 74.81.-g

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Based on the previously suggested model of nanoscale dislocation-induced Josephson junctions and their arrays, we study the magnetic-field-induced electric polarization effects in intrinsically granular superconductors. In addition to a new phenomenon of chemomagnetoelectricity, the model also predicts a few other interesting effects, including charge analogues of Meissner paramagnetism (at low fields) and a «fishtail» anomaly (at high fields). The conditions under which these effects can be experimentally measured in nonstoichiometric high-T_c superconductors are discussed.