The low-field peak in magnetization loops of uniform and granular superconductors in perpendicular magnetic fields

T. H. Johansen, D. V. Shantsev, M. R. Koblischka, Y. M. Galperin, P. Nalevka, M. Jirsa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The present work aims to explain the anomalous position of the low-field peak in magnetization loops in Bi-2223 tapes, where the peak is often seen shifted to a positive field on the descending field branch. We prove theoretically that for an infinitely thin and long strip placed in a perpendicular field, the central peak occurs exactly at 0 T, for any function Jc(B). This general result is shown to be in excellent agreement with experimental data. After introducing granularity in such a film into a lattice of small weakly-overlapping disks, the peak becomes shifted to positive values. We conclude that this anomalous behaviour in the magnetization is a definite signature of granularity.

Original languageEnglish
Pages (from-to)1443-1444
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume341-348
Issue numberPART 2
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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