Intergrain flux creep in high-Tc superconductors

Jaakko Paasi; Jarl-Thure Eriksson

doi:10.1103/PhysRevB.48.9873

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Intergrain flux creep in high-Tc superconductors

Jaakko Paasi, Jarl-Thure Eriksson

DOI 10.1103/PhysRevB.48.9873 · Physical Review B

T1

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Abstract

Equations describing the intergrain flux creep of ceramic superconductors are derived. They are based on the behavior of small superconducting loops closed by overdamped Josephson junctions. The elementary loops are formed around nonsuperconducting regions between the grains, the loops acting as pinning centers. Despite different pinning mechanisms the equations for the relaxation of the intergrain current density in a static and a slowly varying external magnetic field are formally similar to those of the classical flux-creep theory based on volume pinning.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(Bi,Pb)2Sr2Ca2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown