A comparison of twin boundary pinning in nearly fully stoichiometric and oxygen deficient YBa[sub 2]Cu[sub 3]O[sub 7-[delta]]
Conference
·
OSTI ID:6906158
The angular dependence of the magnetoresistance was measured on the same single crystal of a YBa[sub 2]Cu[sub 3]O[sub 7-[delta]] prepared initially with a superconducting transition temperature of 93.0K and then annealed to obtain a transition temperature of 56.9K. A second oxygen deficient sample was produced with a transition temperature 57.0K and nearly identical transport characteristics. Twin boundary pinning superimposed on flux flow behavior was observed in both the 56.9K and 93.0K states for magnetic field rotation in ab plane. For magnetic field rotations off the c axis we observe twin boundary pinning only for the nearly stoichiometric state. We find the broadening of the resistive transition in magnetic field (H [parallel] c) to occur over a much larger interval of reduced temperature in the deoxygenated state. The enhanced broadening of the resistive transition in magnetic field and absence of twin boundary pinning may indicate that the vortex system is two dimensional and in general, defects are rendered ineffective in pinning due to the absence of three dimensional collective elastic effects.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6906158
- Report Number(s):
- ANL/MSD/CP-78124; CONF-920802--46; ON: DE93004854; CNN: STC-8809854
- Country of Publication:
- United States
- Language:
- English
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Anisotropic twin boundary pinning in YBa2Cu3Ox
Conference
·
Sat Oct 31 23:00:00 EST 1992
·
OSTI ID:10113998
Anisotropy and Lorentz-force dependence of twin-boundary pinning and its effect on flux-lattice melting in single-crystal YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]
Journal Article
·
Tue Jun 01 00:00:00 EDT 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:6611406
Anisotropic twin boundary pinning in YBa2Cu3Ox
Conference
·
Mon Jul 22 00:00:00 EDT 1991
· Physica. C, Superconductivity
·
OSTI ID:5419890
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
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETORESISTANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TWINNING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETORESISTANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TWINNING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES