The synthesis, by triethylammoniumoxalate coprecipitation, and superconducting properties of Y(Ba sub 1-x Sr sub x ) sub 2 Cu sub 4 O sub 8
- Univ. of Cambridge (United Kingdom)
- National Tsing Hua Univ., Taiwan (China) Inst. of Atomic and Molecular Science, Taiwan (China)
Superconductivity has been investigated in the system Y(Ba{sub 1-x}Sr{sub x}){sub 2}Cu{sub 4}O{sub 8}(O{le}x{le}0.5). The samples were prepared by triethylammoniaoxalate coprecipitation at ambient oxygen pressure. The superconducting transition temperature, T{sub c}, increased from a value of 85 K (x=0) to 90 K (x=0.1-0.2) and then decreased to 64 K at x=0.5. For compositions beyond the solubility limit (x=0.3), the magnitude of dT{sub c}/dx was high, ca. 45 K from 0.3 to 0.5. The maximum T{sub c}, 90 K, recorded from samples in the range x=0.1{approximately}0.2, were confirmed by magnetization measurements. These results are in contrast to those obtained from the Y(Ba{sub 1-x}Sr{sub x}){sub 2}Cu{sub 3}O{sub 7} system, in which T{sub c} decreased monotonically from 93 to 82 K for 0{le}x{le}0.5.
- OSTI ID:
- 7201800
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 92:1; ISSN JSSCB; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
COPRECIPITATION
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INFORMATION
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRECIPITATION
SCATTERING
SEPARATION PROCESSES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
SYNTHESIS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES