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Author Manson, J. T. ♦ Giapintzakis, J. ♦ Schegolev, A. I. ♦ Ginsberg, D. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ HIGH-TC SUPERCONDUCTORS ♦ HALL EFFECT ♦ YTTERBIUM OXIDES ♦ PRASEODYMIUM OXIDES ♦ BARIUM OXIDES ♦ COPPER OXIDES ♦ QUATERNARY COMPOUNDS ♦ MONOCRYSTALS ♦ MIXED STATE ♦ SUBSTITUTION
Abstract We have measured the Hall and longitudinal resistivities of detwinned Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals with {ital x}=0.05, 0.10, 0.15, and 0.20. In the mixed state, the samples with {ital x}=0.05 and 0.10 exhibit a sign reversal of the Hall resistivity. However, the sign reversal is absent in the samples with {ital x}=0.15 and 0.20. The disappearance of the sign reversal in the {ital x}=0.15 sample represents a new finding. It indicates that the presence or absence of the sign reversal is not a thermal effect, since this sample has a {ital T}{sub {ital c}} of 82 K, and many other superconductors with the same {ital T}{sub {ital c}} exhibit the sign reversal. We have calculated the in-plane Hall conductivity, and find that it can be expressed as the sum of two terms, {ital C}{sub 1}/{ital H} and {ital C}{sub 2}{ital H}. {ital C}{sub 1} and {ital C}{sub 2} are independent of field, but depend on temperature and Pr concentration. The temperature dependences of {ital C}{sub 1} and {ital C}{sub 2} weaken with increasing Pr concentration up to the disappearance of the sign reversal, at which point {ital C}{sub 1} changes sign and begins to depend more strongly on temperature again. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-10-01
Publisher Department University of Illinois
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 14
Organization University of Illinois


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