Effects of Th doping on structural and superconductive properties of La sub 2 minus x Ba sub x CuO sub 4 (JP)
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Physics, Faculty of Science, Hiroshima University, Hiroshima 730 (Japan)
The striking suppression of superconductivity of La{sub 2{minus}{ital x}}Ba{sub {ital x}}CuO{sub 4} in a narrow range of {ital x} around 0.125 is known to be a consequence of a structural transition to a low-temperature tetragonal phase below about 60 K. Study of low-temperature lattice instabilities by x-ray diffraction revealed that in La{sub 2{minus}{ital y}{minus}{ital x}}Th{sub {ital y}}Ba{sub {ital x}}CuO{sub 4} the development of the low-temperature tetragonal phase, as well as the sharp suppression of superconductivity, is centered at {ital x}{minus}{ital y}{congruent}0.125, instead of {ital x}{congruent}0.125. Therefore, the anomalous low-temperature behavior is essentially characterized by the density of carriers rather than local ionic forces, which couples with the lattice instabilities.
- OSTI ID:
- 5172248
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:14; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Thu Jan 20 23:00:00 EST 2000
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OSTI ID:755024
Stability of the low-temperature tetragonal phase in La[sub 2[minus]x]Ba[sub x]CuO[sub 4] and related compounds
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OSTI ID:7070524
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE ALLOYS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
INSTABILITY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THORIUM ADDITIONS
THORIUM ALLOYS
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE ALLOYS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
INSTABILITY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THORIUM ADDITIONS
THORIUM ALLOYS
TRANSITION ELEMENT COMPOUNDS