Synthesis and characterization of rare-earth barium antimonates, a new group of complex perovskites suitable as substrates for YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} films
- Regional Research Lab., Trivandrum (India)
A new group of complex perovskites, REBa{sub 2}SbO{sub 6} (where RE = Pr, Sm, and Gd), have been synthesized and sintered as single phase materials by the solid state reaction method. These materials are found to be isostructural and to have a complex cubic perovskite structure. X-ray diffraction and resistivity measurements have shown that there is no detectable chemical reaction between YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} and REBa{sub 2}SbO{sub 6} even under severe heat treatment at 950{degrees}C and that the addition of REBa{sub 2}SbO{sub 6} up to 20 vol% in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} shows no detrimental effect on the superconducting properties of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}. The dielectric constant and loss factor values of the sintered REBa{sub 2}SbO{sub 6} materials are in a range suitable for their use as substrates for microwave applications. Thick films of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} fabricated on polycrystalline REBa{sub 2}SbO{sub 6} substrates give superconducting zero resistivity transition temperature T{sub c(0)} = 92 K, indicating the suitability of these materials as substrates for YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} films.
- OSTI ID:
- 70195
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 116; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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