Direct observation of the current distribution in thin superconducting strips using magneto-optic imaging

T. H. Johansen, M. Baziljevich, H. Bratsberg, Y. Galperin, P. E. Lindelof, Y. Shen, and P. Vase
Phys. Rev. B 54, 16264 – Published 1 December 1996
PDFExport Citation

Abstract

Magneto-optic imaging was used for a detailed study of the flux and current distribution of a long thin strip of YBa2Cu3O7δ placed in a perpendicular external magnetic field. The inverse magnetic problem, i.e., that of deriving from a field map the underlying current distribution, is formulated and solved for the strip geometry. Applying the inversion to the magneto-optically found field map we find on a model-independent basis the current distribution across the strip to be in remarkable agreement with the profile predicted by the Bean model. The paper also presents results on the behavior of the Bi-doped YIG film with in-plane anisotropy which we use as field indicator, explaining why previous measurements of flux density profiles have displayed surprisingly large deviations from the expected behavior. © 1996 The American Physical Society.

  • Received 9 July 1996

DOI:https://doi.org/10.1103/PhysRevB.54.16264

©1996 American Physical Society

Authors & Affiliations

T. H. Johansen, M. Baziljevich, H. Bratsberg, and Y. Galperin

  • Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo, Norway

P. E. Lindelof

  • Niels Bohr Institute, O/rsted Laboratory, Universitetsparken 5, 2100 Ko/benhavn O/, Denmark

Y. Shen and P. Vase

  • NKT Research Center, Sognvej 11, 2605 Bro/ndby, Denmark

References (Subscription Required)

Click to Expand
Issue

Vol. 54, Iss. 22 — 1 December 1996

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×