Magneto-optical investigations as a tool to improve quality of (Pb,Bi)-2223 tapes

M. R. Koblischka, W. G. Wang, B. Seifi, P. Skov-Hansen, P. Vase, N. H. Andersen

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Flux distributions of multifilamentary (Pb,Bi)-2223 tapes are investigated by magneto-optic (MO) imaging at T = 10K and in different field orientations. This enables to study differences between the individual filaments in a direct way. To our knowledge we have for the first time applied the field perpendicular to a cross section of an intact tape, i.e. the external field is aligned along the individual filaments. This geometry of the MO experiments enables the study of the superconducting properties of the filaments as a function of position in the tape. The flux patterns reveal the shielding properties (= critical current density) of the filaments; and the studies clearly show differences in the superconducting properties between the different filaments. Our observations provide therefore important informations for further development of the (Pb,Bi)-2223 tapes.

Original languageEnglish
Pages (from-to)3242-3245
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 III
DOIs
Publication statusPublished - 2001 Mar 1
Externally publishedYes
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22

Keywords

  • (Pb,Bi)-2223 tapes
  • Critical current density
  • Cross sections
  • Flux distributions
  • MO imaging

ASJC Scopus subject areas

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

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