a - b anisotropy of the normal-state resistivity of untwinned YBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, IL (USA) Materials Science Division, Argonne National Laboratory, Argonne, IL (USA)
- Department of Physics, University of California-Davis, Davis, CA (USA)
The {ital a}-{ital b} anisotropy of the normal-state resistivity {rho}{sub {ital a}}/{rho}{sub {ital b}} of untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} has been studied on six crystals using the Montgomery method. {rho}{sub {ital a}}/{rho}{sub {ital b}} increases with increasing temperature and reaches a (sample-dependent) value of 1.2--1.85 near room temperature. The wide variation of this value is attributed to the high sensitivity of the chain resistance to oxygen disorder. The temperature dependence of {rho}{sub {ital a}}/{rho}{sub {ital b}} can be modeled by a parallel circuit of metallic chains and superconducting planes with excess conductivity due to superconducting fluctuations in the planes at temperatures below 150 K.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5995224
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:16; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Mon Oct 01 00:00:00 EDT 1990
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OSTI ID:6192949
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LOW TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TWINNING
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LOW TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TWINNING
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES