In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 7, No. 10 ( 1992-10), p. 2680-2688
Abstract:
Textured superconducting films of YbBa 2 Cu 3 O 7−δ were grown on single crystals of MgO (100) and SrTiO 3 (100) by oxidation of a liquid alloy precursor. The substrates were coated by dipping them in molten YbBa 2 Cu 3 (m.p. ~870 °C). After removal from the melt, the liquid layers on the substrates were oxidized in pure oxygen to form the tetragonal oxide phase, i.e., YbBa 2 Cu 3 O 7−δ , then annealed at 500 °C to obtain the superconducting orthorhombic phase of the same compound. The microstructure of the films obtained in this way was found to be related to the nature of the substrate as well as to processing variables that included oxidation temperature and oxidation time. Films grown on MgO (100) showed c -axis texture as well as a random growth structure. Films prepared on SrTiO 3 (100) showed either a c-axis texture or a mixture of c-axis and a -axis texture. The superconducting properties of the as-prepared films and the effects of key process parameters on film quality and microstructure are presented and discussed.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.1992.2680
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
1992
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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