Effects of coexisting nonsuperconducting phase on the superconductivity of YBa sub 2 Cu sub 3 O sub 7
Journal Article
·
· Journal of Applied Physics; (USA)
- Ceramics Research Laboratory, Onoda Cement Co. Ltd., Tokyo 135, Japan (JP)
The effects of coexisting nonsuperconducting phases (BaCuO{sub 2}, Y{sub 2}Cu{sub 2}O{sub 5} and Y{sub 2}BaCuO{sub 5}) on the superconductivity of YBa{sub 2}Cu{sub 3}O{sub 7} have been investigated by measuring the temperature-dependent resistivity and ac susceptibility. As the fraction of the nonsuperconducting phase is increased in the YBa{sub 2}Cu{sub 3}O{sub 7} sample (1) the onset and apparent zero {ital T}{sub {ital c}} in the {ital R}-{ital T} curves shift to a lower temperature, (2) the temperature region of the resistive transition becomes broad, and (3) the behavior of the resistivity changes from metallic to semiconductorlike at temperatures above {ital T}{sub {ital c}}. The resistivity measured as a function of temperature is simulated using a paralleled-circuit model. The model reproduces well the observed {ital R}-{ital T} curves and in all the observations stated above.
- OSTI ID:
- 5372553
- Journal Information:
- Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 66:10; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SIMULATION
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SIMULATION
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES