Pair-breaking effect of high current densities on the superconducting transition in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]

Journal Article · Mon Jan 31 04:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.752· OSTI ID:5185690

Kunchur, M N; Christen, D K; Klabunde, C E ^[1]; Phillips, J M ^[2]

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1. Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6057 (United States)
2. AT T Bell Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974 (United States)

The equilibrium resistive transition of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] epitaxial films was measured at high pulsed current densities [ital J], to promote homogeneous current flow and free flux flow. The superconducting transition temperature [ital T][sub [ital c]] was then depressed as a function of [ital J] in fixed fields [ital H]. The shifts in [ital T][sub [ital c]], defined near midtransition, scaled following Ginzburg-Landau behavior: [Delta][ital T][sub [ital c]]([ital H],[ital J])/[ital T][sub [ital c]]([ital H],0)=[[ital J]/[ital J][sub 0]][sup 2/3], where [ital J][sub 0] is a field- and current-indpendent constant.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5185690
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:5; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EPITAXY
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES