This article is cited in 12 papers

CONDENSED MATTER

Chemomagnetism, magnetoconcentration effect and «fishtail» anomaly in chemically-induced granular superconductors

S. A. Sergeenkov<sup>ab

a</sup> Joint Institute for Nuclear Research, Bogoliubov Laboratory of Theoretical Physics
^b Unitá di Ricerca INFM, Universitá di L'Aquila

Abstract: Within a 2D model of Josephson junction arrays (created by 2D network of twin boundary dislocations with strain fields acting as an insulating barrier between hole-rich domains in underdoped crystals), a few novel effects expected to occur in intrinsically granular material are predicted including: (i) Josephson chemomagnetism (chemically induced magnetic moment in zero applied magnetic field) and its influence on a low-field magnetization (chemically induced paramagnetic Meissner effect), and (ii) magnetoconcentration effect (creation of oxygen vacancies in applied magnetic field) and its influence on a high-field magnetization (chemically induced analog of «fishtail» anomaly). The conditions under which these effects can be experimentally measured in non-stoichiometric high-$T_c$ superconductors are discussed.

PACS: 61.72.-y, 74.25.Ha, 74.50.+r, 74.72.-h

Received: 25.11.2002
Revised: 16.12.2002

Language: English

 English version: Journal of Experimental and Theoretical Physics Letters, 2003, 77:2, 94–98

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