Stability of the low-temperature tetragonal phase in La[sub 2[minus]x]Ba[sub x]CuO[sub 4] and related compounds
Conference
·
· Journal of Superconductivity; (United States)
OSTI ID:7070524
- Hiroshima Univ. (Japan)
In La[sub 2[minus]x]Ba[sub x]CuO[sub 4] (LBCO), the structural transition to a low-temperature tetragonal phase below 60 K and suppression of superconductivity are observed when the carrier density is p [approximately] 1/8 per copper. The replacement by divalent ions smaller than Ba[sup 2+] suppresses the static deformation of the lattice. We have found that the variations T[sub d2], and superconducting transition temperature Tc are quantitatively characterized by the averaged ionic radius at the La site or lattice parameters. This aspect of substitution could be regarded as the effect of chemical pressure, since similar variations have been reported on applying hydrostatic pressure. In La[sub 2[minus]x[minus]y]Nd[sub y](Ba, Sr)[sub x]CuO[sub 4], T[sub d2] increases with increasing y in a wide range of p while Tc is suppressed only at p approximately 1/8. The structural transition at T[sub d2] here should be ascribed mainly to the crystallochemical origin. 12 refs., 2 figs.
- OSTI ID:
- 7070524
- 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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Book
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Thu Jan 20 23:00:00 EST 2000
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OSTI ID:755024
Substitution effects on the electronic anomaly and superconductivity in La{sub 2-x}Ba{sub x}CuO{sub 4} and La{sub 2-x}Sr{sub x}CuO{sub 4} with x {approximately} 1/8
Journal Article
·
Thu Oct 31 23:00:00 EST 1996
· Journal of Low Temperature Physics
·
OSTI ID:457183
Effects of Th doping on structural and superconductive properties of La sub 2 minus x Ba sub x CuO sub 4 (JP)
Journal Article
·
Tue Oct 01 00:00:00 EDT 1991
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:5172248
Related Subjects
36 MATERIALS SCIENCE
360607* -- Other Materials-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CARRIER DENSITY
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLOGRAPHY
CUPRATES
DEFORMATION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
STABILITY
STRONTIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
360607* -- Other Materials-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CARRIER DENSITY
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLOGRAPHY
CUPRATES
DEFORMATION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
STABILITY
STRONTIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS