Critical currents, magnetic relaxation, and microstructure in zone-melted YBa₂Cu₃O_x

Conference · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.1109/20.133366· OSTI ID:6411816

Shi, Donglu; Chen, J G; Xu, Ming; Goretta, K C ^[1]; McGinn, P J; Chen, W H ^[2]

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1. Argonne National Lab., IL (USA)
2. Notre Dame Univ., IN (USA)

Extruded YBa{sub 2}Cu{sub 3}O{sub x} wires have been zone-melted to develop highly textured microstructures. The zone-melted wires exhibit large magnetic hysteresis and transport J{sub c} values relative to conventional bulk YBa{sub 2}Cu{sub 3}O{sub x}. Transmission electron microscopy observations indicate unique grain boundary features which are likely to be responsible for reduced weak-link effects. Large amounts of intragranular defects such as dislocations and Y{sub 2}BaCuO{sub 5} particles have been observed in the sample matrices. The dislocations are possibly connected with the greatly increased magnetic hysteresis. 11 refs., 5 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER; NSF
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6411816
• Report Number(s): CONF-900944-36; ON: DE91006594; CNN: MSM-871843
• 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
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
DISLOCATIONS
ELECTRIC CURRENTS
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
LINE DEFECTS
MAGNETIC PROPERTIES
MELTING
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZONE MELTING