Images of the vortex chain state in untwinned YBa sub 2 Cu sub 3 O sub 7 minus. delta. crystals
- AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
- Department of Physics, University of Illinois, Urbana, Illinois 61801 (United States)
A vortex lattice consisting of a pinstripe pattern of vortex chains has been observed in untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} crystals. This state is present when the field is tilted away from the {bold {cflx c}} axis, and is oriented with the chains confined to the plane defined by {bold B} and {bold {cflx c}}. The chains arise from the attractive part of the vortex-vortex interaction in this geometry as described within the ansiotropic London equations. For {ital B}{gt}{Phi}{sub 0}/2{pi}{tilde {lambda}} {sup 2} the chains merge into an oriented vortex lattice. From the fitted value of {tilde {lambda}}, we can conclude that the microscopic irreversibility temperature is {ital T}/{ital T}{sub {ital c}}{similar to}0.92 for {ital B}{similar to}20 G.
- OSTI ID:
- 7293123
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:22; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHAINS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRON MICROSCOPY
EQUATIONS
HIGH-TC SUPERCONDUCTORS
IMAGES
LONDON EQUATION
MAGNETIC FLUX
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VORTICES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES