Superconducting properties of La/sub 2-//sub x/Ba/sub x/CuO/sub 4/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We show that the superconducting transition temperature T/sub c/ of La/sub 2-//sub x/Ba/sub x/CuO/sub 4/ as a function of barium content (0less than or equal toxless than or equal to0.25, determined by mutual inductance measurements) has two maxima, both T/sub c/approx. =25 K, near compositions x = 0.09 and x-0.15. Between these two maxima is a local minimum (T/sub c/ about 5 K) for x = 0.12. dc magnetization data are also reported for six compositions. Anomalies in electrical resistance appear near T = 50--60 K at compositions 0.10less than or equal toxless than or equal to0.125. Many samples clearly show a second resistive superconducting transition near 30 K in addition to the bulk transition most clearly observed magnetically. The variation of T/sub c/ with composition is discussed in relation to the occurrence of resistance anomalies. The tetragonal lattice parameters at room temperature are consistent with previous work, and show no obvious anomalies. The sample preparation procedures are discussed in detail.
- Research Organization:
- Division of Materials Science, Brookhaven National Laboratory, Upton, New York 11973
- OSTI ID:
- 7090191
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:7; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Journal Article
·
Sat Aug 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6371026
High T/sub c/ superconductivity in the Ba/sub x/Y/sub 1-//sub x/CuO/sub 3-//sub y/ series
Journal Article
·
Sat Oct 01 00:00:00 EDT 1988
· Chin. Phys.; (United States)
·
OSTI ID:6725788
Superconducting behaviors in (Y/sub 1-//sub x/La/sub x/)Ba/sub 2/Cu/sub 3/O/sub y/ (0less than or equal toxless than or equal to1)
Journal Article
·
Mon Nov 14 23:00:00 EST 1988
· J. Appl. Phys.; (United States)
·
OSTI ID:6743802
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
ALKALINE EARTH METALS
BARIUM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE PARAMETERS
MAGNETIZATION
MEDIUM TEMPERATURE
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
SAMPLE PREPARATION
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BARIUM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE PARAMETERS
MAGNETIZATION
MEDIUM TEMPERATURE
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
SAMPLE PREPARATION
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS