Effect of Ga addition to YBa/sub 2/Cu/sub 3/O/sub 7/
The effect of Ga substitution for Cu in YBa/sub 2/(Cu/sub 1-//sub x/Gai/sub x/)/sub 3/O/sub y/ has been investigated for nominal compositions xless than or equal to0.10. Samples are tetragonal for x>0.03. For xgreater than or equal to0.05, evidence for second phase appears in x-ray-diffraction diagrams. Superconducting transition temperature T/sub c/ falls systematically with increasing x. The systematic variations in T/sub c/ and lattice parameters with nominal x suggest that Ga solid solution may extend to x = 0.05. However, electron microprobe results indicate that Ga incorporation into the superconducting phase is extremely limited; the Ga content x of the superconducting phase appears to be xless than or equal to0.01. A Ga-rich second phase is also observed by microprobe for 0.01less than or equal toxless than or equal to0.10.
- Research Organization:
- Division of Materials Science, Brookhaven National Laboratory, Upton, New York 11973
- OSTI ID:
- 7063172
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:10; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CORRELATIONS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GALLIUM ADDITIONS
GALLIUM ALLOYS
IMPURITIES
INHIBITION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
SAMPLE PREPARATION
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES