Flux creep and pinning potential distribution in zone-melted YBa sub 2 Cu sub 3 O sub x

Journal Article · Mon Jul 08 04:00:00 EDT 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.105973· OSTI ID:5622193

Shi, D; Goretta, K C; Salem-Sugui, S Jr ^[1]; McGinn, P J; Chen, W H; Zhu, N ^[2]

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1. Argonne National Laboratory, Argonne, Illinois 60439 (USA)
2. Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (USA)

Magnetic relaxation data have been taken on zone-melted and sintered YBa{sub 2}Cu{sub 3}O{sub {ital x}} samples over wide temperature and magnetic field ranges. We have found that magnetic relaxation varies greatly in the samples with different microstructures and crystallographic orientations. Flux-creep rates have been found to be reduced in the zone-melted samples owing to large amounts of intragranular crystal defects such as edge dislocations and stacking faults. An important flux-pinning behavior related to the pinning potential distributions has been observed in the samples. The relationship between microstructural orientation and pinning potential distributions in YBa{sub 2}Cu{sub 3}O{sub {ital x}} is discussed.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5622193
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 59:2; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
ANL
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
HIGH-TC SUPERCONDUCTORS
LINE DEFECTS
MAGNETIC FLUX
MELTING
MICROSTRUCTURE
NATIONAL ORGANIZATIONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUATERNARY COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZONE MELTING