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ZhETF, Vol. 128, No. 5, p. 1054 (November 2005)
(English translation - JETP, Vol. 101, No. 5, p. 919, November 2005 available online at www.springer.com )

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

DJVU (86.6K) PDF (285.8K)

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-Tc superconductors are discussed.

 
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