Simulation of the intergranular magnetization of (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors by using Josephson junction arrays

Jaakko Paasi, Antti Tuohimaa, Jarl Thure Eriksson

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Abstract

In this paper we present a numerical simulation study of the intergranular magnetization of (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors. The intergranular-current system was modelled as a two-dimensional Josephson junction array, which consists of superconducting grains connected via overdamped, narrow Josephson weak links. The simulations cover magnetic-flux distribution and magnetic-hysteresis studies, including relaxation effects due to thermal fluctuations in the junctions. Special attention was paid to the influence of intergranular defects on the array magnetization and intergranular flux pinning, with the motivation to find model parameters which fit to the experimental behavior of (Bi,Pb)2Sr2Ca2Cu3O10+x. A correspondence with the experimental results [Paasi et al., Physica C 259 (1996) 1) (previous paper)] required that there was an intergranular defect of the μm order located in the middle of the four grains of an array mesh. Such a defect could act as a strong pinning center for intergranular flux.

Original languageEnglish
Pages (from-to)10-26
Number of pages17
JournalPhysica C: Superconductivity and its Applications
Volume259
Issue number1-2
DOIs
Publication statusPublished - 1 Mar 1996
MoE publication typeA1 Journal article-refereed

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