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Author Lucht, R. ♦ Loehneysen, H. v. ♦ Claus, H. ♦ Klaeser, M. ♦ Mueller-Vogt, G.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ MEISSNER-OCHSENFELD EFFECT ♦ COPPER OXIDES ♦ BARIUM OXIDES ♦ YTTRIUM OXIDES ♦ SURFACE PROPERTIES ♦ TRANSITION TEMPERATURE ♦ ANNEALING ♦ MAGNETIZATION
Abstract It is demonstrated that the paramagnetic Meissner effect observed in some of our YBa{sub 2}Cu{sub 3}O{sub {ital x}} single crystals is associated with an anomalous surface layer. This surface layer, which has a superconducting transition temperature slightly higher than the bulk, develops when the crystals are annealed below 400 {degree}C. When the layer is mechanically removed, the paramagnetic Meissner effect disappears and the crystals behave as normal. Our results demonstrate that the Meissner effect can be masked by unusual properties of a thin surface layer. Thus the measured field-cooled magnetization may not represent the bulk Meissner effect.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-10-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 52
Issue Number 13


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