Abstract
Within a 2D model of Josephson junction arrays (created by a 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) the magnetoconcentration effect (creation of oxygen vacancies in applied magnetic field) and its influence on a high-field magnetization (the chemically induced analogue of the “fishtail” anomaly). The conditions under which these effects can be experimentally measured in nonstoichiometric high-T c superconductors are discussed.
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From Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 77, No. 2, 2003, pp. 99–103.
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Sergeenkov, S.A. Chemomagnetism, magnetoconcentration effect, and “fishtail” anomaly in chemically induced granular superconductors. Jetp Lett. 77, 94–98 (2003). https://doi.org/10.1134/1.1564227
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DOI: https://doi.org/10.1134/1.1564227