Anisotropy and dimensionality in untwinned crystals of YBa sub 2 Cu sub 3 O sub 7 minus. delta
Conference
·
OSTI ID:5246380
- Argonne National Lab., IL (USA)
- Chicago Univ., IL (USA)
- Western Illinois Univ., Macomb, IL (USA)
- California Univ., Davis, CA (USA)
A review of dc magnetization measurements of the superconducting transition in twinned and untwinned single crystals of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} is presented. The upper critical fields derived from the onset of diamagnetism are a factor of 3-4 times larger than those determined from the zero resistance temperature. The magnetic upper critical fields are linear in temperature with an anisotropy in slope of {approximately}5 between the c direction and the ab plane. The angular dependence of the upper critical field implies three dimensional behavior. A crossover to layered behavior is estimated to occur at {approximately}74 K. In untwinned crystals produced by uniaxial strain technique, there is no detectable anisotropy in the upper critical field in the ab plane, implying that the one dimensional Cu-O chains do not play a significant role in determining the superconducting properties. 15 refs., 7 figs.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- DOE/ER; NSF
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5246380
- Report Number(s):
- CONF-890939-3; ON: DE90004890; CNN: STC--8809854
- Country of Publication:
- United States
- Language:
- English
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Mon Jul 01 00:00:00 EDT 1991
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OSTI ID:5362628
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Sat Oct 31 23:00:00 EST 1992
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·
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Anisotropic superconducting properties of YBa sub 2 Cu sub 3 O sub 7 minus. delta. (. delta. =0. 1 and 0. 4) untwinned single crystals
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Sun Nov 26 23:00:00 EST 1989
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OSTI ID:5147761
Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETIC FIELDS
MAGNETIZATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TWINNING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETIC FIELDS
MAGNETIZATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TWINNING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES