Vortex pinning and twin boundaries in YBa sub 2 Cu sub 3 O sub 7 minus. delta. thin films
- 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), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:16; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DIAGRAMS
FILMS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETIZATION
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TWINNING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES