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 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.750· OSTI ID:7145544

Parkin, S S.P.; Lee, V Y; Nazzal, A I; Savoy, R; Beyers, R; La Placa, S J

We report the discovery of three new phases in the Tl-Ca-Ba-Cu-O system, Tl/sub 1/Ca/sub n//sub -1/Ba/sub 2/Cu/sub n/O/sub 2//sub n//sub +3/ (n = 1,2,3), one of which (n = 3) exhibits bulk superconductivity at approx. =110 K. The crystal structures of these new materials are closely related to that of Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub x/, the recently discovered 125-K superconductor. All of these compounds contain Cu perovskitelike units, but whereas these are separated by bilayer Tl-O sheets in the 125-K material these are separated by monolayer Tl-O sheets in the new structures, enabling an examination of the role played by the coupling between successive Cu perovskite units on superconducting properties.

• Research Organization: IBM Almaden Research Center, San Jose, California 95120-6099
• OSTI ID: 7145544
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:6; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
LOW TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE