Bulk superconductivity at 125 K in Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub x/
Journal Article
·
· Phys. Rev. Lett.; (United States)
Bulk superconductivity is reported in Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub x/ with a transition to zero resistance at approx. =125 K, the highest transition temperature (T/sub c/) yet found. Transmission electron spectroscopy shows that the unit cell is body-centered tetragonal and contains trilayer Cu perovskitelike units separated by bilayer Tl-O units. T/sub c/ in this material varies from 118 to 125 K depending on preparation conditions. A high density of perovskitelike bilayer intergrowths are observed in the 118-K material, which we speculate result in the decreased T/sub c/. A second structure containing only bilayer perovskitelike units: Tl/sub 2/Ca/sub 1/Ba/sub 2/Cu/sub 2/O/sub x/: is a bulk superconductor with T/sub c/ ranging from 95 to 108 K.
- Research Organization:
- IBM Research Division, Almaden Research Center, San Jose, California 95120
- OSTI ID:
- 7248942
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 60:24; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Model family of high-temperature superconductors: Tl/sub m/Ca/sub n//sub -1/Ba/sub 2/Cu/sub n/O/sub 2(//sub n//sub +1)+//sub m/ (m = 1,2; n = 1,2,3)
Tl/sub 1/Ca/sub n//sub -1/Cu/sub n/O/sub 2//sub n//sub +3/(n = 1,2,3): A new class of crystal structures exhibiting volume superconductivity at up to approx. =110 K
Crystal structure of Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/, a 125 K superconductor
Journal Article
·
Sat Oct 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6824501
Tl/sub 1/Ca/sub n//sub -1/Cu/sub n/O/sub 2//sub n//sub +3/(n = 1,2,3): A new class of crystal structures exhibiting volume superconductivity at up to approx. =110 K
Journal Article
·
Mon Aug 08 00:00:00 EDT 1988
· Phys. Rev. Lett.; (United States)
·
OSTI ID:7145544
Crystal structure of Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/, a 125 K superconductor
Journal Article
·
Fri Apr 29 00:00:00 EDT 1988
· Science (Washington, D.C.); (United States)
·
OSTI ID:7009261
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LOW TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LOW TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE