Superconductivity and the metal-semiconductor transition in the septenary oxide system, (Tl sub 0. 5 Pb sub 0. 5 )(Ca sub 1-y Y sub y )Sr sub 2 Cu sub 2 O sub 7-. delta
- Univ. of Cambridge (England) Industrial Technology Research Institute, Hsinchu (Taiwan)
- Univ. of Cambridge (England)
- Industrial Technology Research Institute, Hsinchu (Taiwan)
The septenary compound (Tl{sub 0.5}Pb{sub 0.5})(Ca{sub 1-y}Y{sub y})Sr{sub 2}Cu{sub 2}O{sub 7-{delta}} exhibits the highest superconducting transition temperature (110 K) yet observed in the TlCaBa{sub 2}Cu{sub 2}O{sub 7-{delta}} (1122) structure type. This complex, six-blend combination of metallic elements which make up the material is, however, compensated by a relatively simply crystal structure, which bears many similarities to that of 90 K superconductor YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}. In this note we report some important features of the cation-substitution chemistry of the title compound, drawing attention to the fundamental changes in the electronic properties of the (Tl{sub 0.5}Pb{sub 0.5})(Ca{sub 1-y}Y{sub y})Sr{sub 2}Cu{sub 2}O{sub 7-{delta}} system as Ca{sup 2+} is replaced by Y{sup 3+}.
- OSTI ID:
- 6550002
- Journal Information:
- Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 86:2; ISSN 0022-4596; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METALS
CALCIUM
CHALCOGENIDES
COMPOSITE MATERIALS
COPPER COMPOUNDS
COPPER OXIDES
DATA
DATA ANALYSIS
ELECTRONIC STRUCTURE
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
LEAD
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
STRONTIUM
SUPERCONDUCTING COMPOSITES
THALLIUM
TRANSITION ELEMENT COMPOUNDS