Enhancement of the superconducting transition temperature of TlSr sub 2 CaCu sub 2 O sub 7 by yttrium and vanadium substitutions
- Univ. of Cambridge (England)
Superconductivity at 105 K has recently been observed in a family of compounds (tl{sub 1{minus}x}M{sub x})Sr{sub 2}(Ca{sub 1{minus}y}Y{sub y})Cu{sub 2}O{sub 7{minus}{Delta}}(M = Ti, Zr, Hf, V, Nb, and Ta). An interesting feature is the enhancement of T{sub c} in the parent TlSr{sub 2}CaCu{sub 2}O{sub 7} compound via substitution of high-valent 3d transition metals; this is in contrast to other high-T{sub c} cuprates investigated so far. The effects on crystal structure and electronic properties of yttrium and vanadium doping in the metallic, but not superconducting, TlSr{sub 2}CaCu{sub 2}O{sub 7} compound are described. The new high-T{sub c} superconductor, (Tl{sub 0.5}V{sub 0.5})Sr{sub 2}(Ca{sub 0.8}Y{sub 0.2})Cu{sub 2}O{sub 7{minus}{delta}}, exhibits a current density of 1.5x10{sup 7} A/cm{sup 2} at 5 k and 1 T for sintered material which is comparable to that observed in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and YBa{sub 2}Cu{sub 4}O{sub 8}.
- OSTI ID:
- 5689303
- Journal Information:
- Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 91:2; ISSN JSSCB; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CURRENT DENSITY
DATA
ELEMENTS
EXPERIMENTAL DATA
HIGH-TC SUPERCONDUCTORS
INFORMATION
MATERIALS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SINTERED MATERIALS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VANADIUM
YTTRIUM