Enhanced flux pinning by phase decomposition in Y-Ba-Cu-O

Journal Article · Mon Mar 26 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103335· OSTI ID:6977584

Jin, S; Tiefel, T H; Nakahara, S; Graebner, J E; O'Bryan, H M; Fastnacht, R A; Kammlott, G W ^[1]

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1. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (USA)

Significantly improved flux pinning has been achieved in bulk YBa{sub 2}Cu{sub 3}O{sub 7{minus}}{sub {delta}} superconductor ( 123'' compound) containing fine-scale defects ({lt}{similar to}50 A thick). The measured {ital J}{sub {ital c}} intragrain of {similar to}10{sup 5} A/cm{sup 2} at 77 K, {ital H}=0.9 T is about ten times higher than the typical values for bulk Y-Ba-Cu-O. The improved structure was produced by rapid decomposition at 920 {degree}C of the YBa{sub 2}Cu{sub 4}O{sub 8} ( 124'') precursor. This new and simple processing route could lead to a commercially viable processing technique for flux-pinning enhancement in bulk Y-Ba-Cu-O.

• OSTI ID: 6977584
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:13; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
MAGNETIC FLUX
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SAMPLE PREPARATION
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES