Vortex pinning and twin boundaries in YBa sub 2 Cu sub 3 O sub 7 minus. delta. thin films

Journal Article · Sat Dec 01 00:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.10067· OSTI ID:5763753

Lairson, B M; Streiffer, S K; Bravman, J C ^[1]

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1. Department of Materials Science and Engineering, Stanford University, Stanford, CA (USA)

The interaction between magnetic flux vortices and twin boundaries is investigated in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films. Films grown to various thicknesses, and cooled along different paths in the YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} phase diagram, are shown to have various twin boundary microstructures and densities. It is demonstrated that changes in processing result in differences in the vortex-pinning behavior of the films, but that these differences are not due to changes in the microstructure of the twin boundaries. Further, observed differences in the twin spacing do not result in changes in the volume pinning force. This is found to be true in the magnetic-field regime spanning the range from where the flux vortex spacing is large relative to the twin density to where the vortex spacing is small relative to this density.

• OSTI ID: 5763753
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 42:16; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
MAGNETIC FLUX
TWINNING
COPPER OXIDES
YTTRIUM OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETIZATION
MICROSTRUCTURE
PHASE DIAGRAMS
SPUTTERING
SUPERCONDUCTING FILMS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
DIAGRAMS
FILMS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties