Synthesis of c-oriented YbBa sub 2 Cu sub 3 O sub 7-. delta. films on single and polycrystalline substrates by oxidation of liquid alloys
- Argonne National Lab., IL (United States)
- American Superconductor Corp., Watertown, MA (United States)
Textured superconducting films of YbBa{sub 2}Cu{sub 3}O{sub 7-{delta}} supported on single and polycrystalline substrates were prepared by oxidation of a liquid precursor alloy. The substrates were coated by dipping them into a molten alloy (YbBa{sub 2}Cu{sub 3}, m.p. {approximately}870{degree}C), withdrawing them from the melt, then oxidizing the adhering liquid alloy layer to the corresponding oxide phase, i.e., YbBa{sub 2}Cu{sub 3}O{sub 7-{delta}}. Samples prepared in this way exhibited a superconducting transition at {approximately}80 K following annealing in pure OP{sub 2} at 500{degree}C. With SrTiO{sub 3} (100) and MgO (100) substrates, evidence was seen for the epitaxial growth of YbBa{sub 2}Cu{sub 3}O{sub 7-{delta}} crystals having their c-axis parallel to the (100) direction of the substrate. For polycrystalline MgO, x-ray diffraction and microstructural examination showed that the high-{Tc} crystallites in the films were also oriented with their c-axis perpendicular to the substrate surface, but the a and b axes directions were randomly oriented rather than epitaxial.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5901865
- Report Number(s):
- ANL/CP-74977; CONF-911202-20; ON: DE92005189
- Resource Relation:
- Conference: Annual fall meeting of the Materials Research Society, Boston, MA (United States), 2-6 Dec 1991
- Country of Publication:
- United States
- Language:
- English
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Epitaxial growth of YbBa sub 2 Cu sub 3 O sub 7 minus. delta. films on (100)-oriented MgO and SrTiO sub 3 substrates by oxidation of a liquid alloy precursor
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Related Subjects
ALLOYS
OXIDATION
BARIUM OXIDES
CHEMICAL PREPARATION
COPPER OXIDES
SUPERCONDUCTING FILMS
YTTERBIUM OXIDES
CRACKS
HIGH-TC SUPERCONDUCTORS
MAGNESIUM OXIDES
SUBSTRATES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
FILMS
MAGNESIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
YTTERBIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)