Orientation-dependent critical currents in Y sub 1 Ba sub 2 Cu sub 3 O sub 7-x epitaxial thin films: Evidence for intrinsic flux pinning

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6543371

Christen, D K; Klabunde, C E; Feenstra, R; Lowndes, D H; Norton, D P; Budai, J D; Kerchner, H R; Thompson, J R; Zhu, S ^[1]; Marwick, A D ^[2]

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1. Oak Ridge National Lab., TN (USA)
2. Thomas J. Watson Research Center, Yorktown Heights, NY (USA)

For YBCO epitaxial thin films the basal plane transport critical current density J{sub c}, flowing perpendicular to an applied magnetic field H, depends sensitively on the orientation of the crystal with respect to H. In particular, J{sub c} is sharply peaked and greatly enhanced when H is precisely parallel to the copper-oxygen planes. Experiments on a series of epitaxial monolithic and superconductor-insulator multilayer thin films provide clear evidence that the enhancement is a bulk, rather than surface or thin sample, phenomenon. Measurements of the orientation dependence are presented and compared with a model of intrinsic flux pinning'' by the layered crystal structure.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6543371
• Report Number(s): CONF-900990-1; ON: DE91001518
• Resource Relation: Conference: 4. annual conference on superconductivity and applications, Buffalo, NY (USA), 18-20 Sep 1990
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
CRITICAL CURRENT
ANGULAR DISTRIBUTION
BARIUM COMPOUNDS
COPPER OXIDES
CURRENT DENSITY
MAGNETIC FIELDS
SUPERCONDUCTING FILMS
THIN FILMS
YTTRIUM COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
DISTRIBUTION
ELECTRIC CURRENTS
FILMS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
656100* - Condensed Matter Physics- Superconductivity
360204 - Ceramics
Cermets
& Refractories- Physical Properties