Magnetic relaxation in YBa sub 2 Cu sub 3 O sub x
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois (USA)
We measured the magnetic relaxation in the high-{ital T}{sub {ital c}} superconductor YBa{sub 2}Cu{sub 3}O{sub {ital x}} at a wide range of temperatures and applied fields. The relaxation measurements were performed on single-crystal, melt-textured, and sintered samples. We found that magnetic relaxation depends strongly on the microstructure and crystal orientation. By combining Bean's critical-state model and the Anderson-Kim flux-creep theory, we used a previously developed expression to interpret the magnetic relaxation behavior and the dependence of the field penetration on the sample size. We also investigated the relationship between the flux-creep-activation pinning energy and the decay of the persistent current in the single-crystal sample of YBa{sub 2}Cu{sub 3}O{sub {ital x}}.
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5205927
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:14; 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
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
CUPRATES
ELECTRIC FIELDS
HIGH-TC SUPERCONDUCTORS
MAGNETIC PROPERTIES
MICROSTRUCTURE
MONOCRYSTALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
RELAXATION
SUPERCONDUCTORS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES