Superconductivity in the tetragonal phase of La[sub 1. 9]Bi[sub 0. 1]CuO[sub 4+[delta]] annealed under high oxygen pressure
Conference
·
· Journal of Superconductivity; (United States)
OSTI ID:7166494
- Tohoku Univ., Sendai (Japan)
We have investigated the relation between the crystal structure and superconductivity in La[sub 1.9]Bi[sub 0.1]CuO[sub 4+[delta]], in which the phase separation observed in La[sub 2]CuO[sub 4+[delta]] is suppressed. A phase diagram in the T [delta] plane is given for La[sub 1.9]Bi[sub 0.1]CuO[sub 4+[delta]] with excess oxygen. For very small [delta] values, the crystal structure is orthorhombic, and an orthorhombic tetragonal phase transition occurs markedly at [delta] approximately 0.03 in the measured temperature range between 13 and 293 K. Superconductivity is observed in the range of 0.04 [approx lt] [delta] [approx lt] 0.11. This is clear evidence that high-Tc superconductivity also appears in the tetragonal phase. 5 refs., 2 figs.
- OSTI ID:
- 7166494
- Report Number(s):
- CONF-930710--
- Conference Information:
- Journal Name: Journal of Superconductivity; (United States) Journal Volume: 7:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360607* -- Other Materials-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
BISMUTH COMPOUNDS
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUPRATES
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
360607* -- Other Materials-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
BISMUTH COMPOUNDS
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUPRATES
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS