Low-field diamagnetic response of granular superconductors at finite temperatures

Journal Article · Sun May 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.12311· OSTI ID:5007531

Auletta, C; Raiconi, G ^[1]; De Luca, R; Pace, S ^[2]

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1. Dipartimento di Informatica, Universita degli Studi di Salerno, 84081 Baronissi (Saudi Arabia) (Italy)
2. Dipartimento di Fisica, Universita degli Studi di Salerno, 84081 Baronissi (Saudi Arabia) (Italy)

We study the low-field diamagnetic response of granular superconductors at finite temperatures by means of a simple two-dimensional Josephson-junction array. The temperature effects are taken into account by inserting white-noise current sources in parallel to the resistively shunted junction circuit models of the Josephson junctions of the network. By this analysis we argue that a simplified one-dimensional description of the equivalent circuit, proposed by the authors for cylindrical granular superconductors, is still valid even in the presence of thermally activated flux jumps. A flux-creep picture for intergranular flux motion follows.

• OSTI ID: 5007531
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 49:17; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
DIAMAGNETISM
EQUIVALENT CIRCUITS
GRANULAR MATERIALS
JOSEPHSON JUNCTIONS
MAGNETIC FLUX
TEMPERATURE DEPENDENCE
TWO-DIMENSIONAL CALCULATIONS
ELECTRONIC CIRCUITS
JUNCTIONS
MAGNETISM
MATERIALS
SUPERCONDUCTING JUNCTIONS
665411* - Basic Superconductivity Studies- (1992-)