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

研究成果: Article

3 引用 (Scopus)

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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.

元の言語English
ページ(範囲)1443-1444
ページ数2
ジャーナルPhysica C: Superconductivity and its applications
341-348
発行部数PART 2
DOI
出版物ステータスPublished - 2000 1 1
外部発表Yes

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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