Rare-earth barium stannates: Synthesis, characterization, and potential use as substrates for YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} superconductor
- CSIR, Trivandrum (India). Regional Research Lab.
A new group of complex perovskites, REBa{sub 2}SnO{sub 5.5} (where RE = Pr, Sm, Eu, and Gd) have been synthesized and sintered as single-phase materials with high sintered density and stability by the solid-state reaction method. The structure of REBa{sub 2}SnO{sub 5.5} was studied by the X-ray diffraction technique, and all of them were found to be isostructural and have a cubic perovskite structure. The dielectric constant and loss factor values of these materials are in a range suitable for substrate applications. The X-ray diffraction and resistivity measurements have shown that there is no detectable reaction between YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and REBa{sub 2}SnO{sub 5.5}, even when the substances are mixed thoroughly and sintered at 950 C for 15 h. Thick films of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} fabricated on polycrystalline REBa{sub 2}SnO{sub 5.5} substrates gave superconducting zero resistivity transition T{sub C(0)} = 92 K, indicating the suitability of these new materials as substrates for YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 136508
- Journal Information:
- Journal of the American Ceramic Society, Vol. 78, Issue 11; Other Information: PBD: Nov 1995
- Country of Publication:
- United States
- Language:
- English
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