Upper critical field of a Sm sub 1. 85 Ce sub 0. 15 CuO sub 4 minus y single crystal: Interaction between superconductivity and antiferromagnetic order in copper oxides

Journal Article · Sun Jan 28 23:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.599· OSTI ID:7008607

Dalichaouch, Y; Lee, B W; Seaman, C L; Markert, J T; Maple, M B ^[1]

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1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (US)

The temperature dependence of the anisotropic upper critical magnetic field, {ital H}{sub {ital c}2}(T), has been determined resistively in antiferromagnetic Sm{sub 1.85}Ce{sub 0.15}CuO{sub 4{minus}{ital y}} single crystals. We observe the first evidence in high-{ital T}{sub {ital c}} copper oxides for the interaction between superconductivity and antiferromagnetic ordering of rare-earth ions; estimates of the exchange coupling {ital J}{approx}0.1 eV and the Ginzburg-Landau coherence lengths {xi}{sub {ital ab}}=79 A and {xi}{sub {ital c}}=14.7 A are obtained. In both Nd{sub 1.84}Ce{sub 0.16}CuO{sub 4{minus}{ital y}} and Sm{sub 1.85}Ce{sub 0.15}CuO{sub 4{minus}{ital y}}, the {ital H}{sub {ital c}2} data above {ital T}{sub {ital N}} can be described by {ital H}{sub {ital c}2}({ital T})/{ital H}{sub {ital c}2}{sup +}(0)=(1{minus}{ital T}/{ital T}{sub {ital c}}){sup 1.6}.

• DOE Contract Number: FG03-86ER45230
• OSTI ID: 7008607
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:5; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETIC MATERIALS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
EXCHANGE INTERACTIONS
FLUXMETERS
GINZBURG-LANDAU THEORY
INTERACTIONS
MAGNETIC FIELDS
MAGNETIC MATERIALS
MATERIALS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MONOCRYSTALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
SAMARIUM OXIDES
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS