Preparation and properties of superconducting Y(Ba sub 1 minus x Sr sub x ) sub 2 Cu sub 4 O sub 8
- Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome 1-Chome, Koto-ku, Tokyo 135, Japan (JP)
We have prepared single-phase or near-single-phase Y(Ba{sub 1{minus}{ital x}}Sr{sub {ital x}}){sub 2}Cu{sub 4}O{sub 8} (0{le}{ital x}{le}0.4) samples by means of a high-oxygen-pressure technique using an O{sub 2} hot isostatic pressing. All the lattice constants, {ital a}, {ital b}, and {ital c}, of Y(Ba{sub 1{minus}{ital x}}Sr{sub {ital x}}){sub 2}Cu{sub 4}O{sub 8} monotonically decreased with increasing Sr content. The superconducting transition temperatures of these samples were nearly constant, being around 80 K, while the {ital T}{sub {ital c}}'s of Y(Ba{sub 1{minus}{ital x}}Sr{sub {ital x}}){sub 2}Cu{sub 3}O{sub {ital z}} ({ital z}{similar to}7) samples decreased with increasing Sr content. When Y in Y(Ba{sub 0.8}Sr{sub 0.2}){sub 2}Cu{sub 4}O{sub 8} was partially substituted by Ca, the superconducting critical temperature increased to near 90 K.
- OSTI ID:
- 6883783
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:16; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
LATTICE PARAMETERS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES