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

Abstract

Within a 2D model of Josephson junction arrays (created by 2D network of twin boundary dislocations with strain fields acting as 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.

5 LaTeX pages (jetpl.sty included), 3 EPS figures. To be published in JETP Letters (January 2003)

References in corpus (2)

• Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+x
• Topologically protected quantum bits from Josephson junction arrays

Cited by in corpus (4)

• Pinning of spiral fluxons by giant screw dislocations in YBa_2Cu_3O_7 single crystals: Josephson analog of the fishtail effect
• Magnetic field induced polarization effects in intrinsically granular superconductors
• Influence of chemical pressure effects on nonlinear thermal conductivity of intrinsically granular superconductors
• On Field Induced Diaelastic Effect in a Small Josephson Contact