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Author Johansen, T. H. ♦ Baziljevich, M. ♦ Bratsberg, H. ♦ Galperin, Y. ♦ Lindelof, P. E. ♦ Shen, Y. ♦ Vase, P.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ ELECTRIC CURRENTS ♦ SUPERCONDUCTING FILMS ♦ YTTRIUM OXIDES ♦ BARIUM OXIDES ♦ COPPER OXIDES ♦ MAGNETIC FLUX ♦ MAGNETO-OPTICAL EFFECTS ♦ SPATIAL DISTRIBUTION ♦ SPATIAL RESOLUTION ♦ IMAGES ♦ DATA ANALYSIS
Abstract Magneto-optic imaging was used for a detailed study of the flux and current distribution of a long thin strip of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} 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. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-12-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 22


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