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

Conference · Mon Apr 01 00:00:00 EST 1991 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5101255

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. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598-0218 (United States)

For YBCO epitaxial thin films the basal plane transport critical current density {ital J}{sub {ital c}}, flowing perpendicular to an applied magnetic field {ital H}, depends sensitively on the orientation of the crystal with respect to H. In particular, {ital J}{sub {ital 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.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5101255
• Report Number(s): CONF-900990-; CODEN: APCPC
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 219:1; Conference: 4. annual conference on superconductivity and its applications, Buffalo, NY (United States), 18-20 Sep 1990; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CURRENTS
COPPER OXIDES
SUPERCONDUCTING FILMS
ANGULAR DISTRIBUTION
YTTRIUM OXIDES
ABLATION
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DISTRIBUTION
FILMS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)