Properties of La/sub 1. 8/Sr/sub 0. 2/CuO/sub 4/ superconductors
Journal Article
·
· Appl. Phys. Lett.; (United States)
Critical current, critical field, and carrier density measurements have been made on bulk samples of La/sub 1.8/Sr/sub 0.2/CuO/sub 4/ to assess the potential of such oxide superconductors for practical applications. The importance of preparing samples in a high oxygen pressure was documented. The upper critical field at T = 0 was estimated to be 530 kOe. From magnetization hysteresis loops, critical current densities were determined between 0 and 60 kOe. At 60 kOe, the values were 2 x 10/sup 3/ A/cm/sup 2/ at 4.2 K and 4 x 10/sup 2/ A/cm/sup 2/ at 18 K in samples that exhibited characteristics of weak flux pinning. The effective carrier density at 48 K was 1 x 10/sup 21/ cm/sup -3/, approximately half of the expected upper limit. A set of microscopic superconducting parameters has been derived from transition temperature, resistivity, and upper and lower critical field measurements made on a single specimen.
- Research Organization:
- Westinghouse RandD Center, Pittsburgh, Pennsylvania 15235
- OSTI ID:
- 6952573
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 50:16; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Mon Jun 01 00:00:00 EDT 1987
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OSTI ID:6481449
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Journal Article
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Fri Apr 15 00:00:00 EDT 1988
· J. Appl. Phys.; (United States)
·
OSTI ID:5278810
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
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRITICAL FIELD
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
HYSTERESIS
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETIZATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRITICAL FIELD
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
HYSTERESIS
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETIZATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE