Strong, asymmetric flux pinning by miscut-growth-initiated columnar defects in epitaxial YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] films
Journal Article
·
· Physical Review Letters; (United States)
- Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831 (United States) Metals and Ceramics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831 (United States)
Strong flux pinning and a pronounced asymmetric angular dependence of [ital J][sub [ital c]]([ital H],[theta]) have been discovered in YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] films grown on miscut, mosaic LaAlO[sub 3] substrate surfaces. A new pinning peak, which at low fields is nearly as strong as the intrinsic pinning,'' is observed for magnetic field orientations between the [ital c] axis and the CuO[sub 2] plane. Cross-section transmission electron microscopy reveals columnar growth defects (2--3 nm diameter) aligned near the [ital c] axis, in concentrations [similar to]10[sup 10] cm[sup [minus]2]. The results demonstrate that deliberately modified substrate surfaces may introduce technologically useful flux pinning in YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] films.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6494610
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 74:12; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
EPITAXY
FILMS
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
VORTICES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
EPITAXY
FILMS
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
VORTICES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES