Texture and transport in spray pyrolyzed TlBa2Ca2Cu3O9 thick films

Autor:	Zhong Lin Wang, J.A. DeLuca, J.A. Sutliff, Clyde L. Briant, D. H. Lowndes, Eliot D. Specht, Amit Goyal, D. M. Kroeger, P. J. Bednarczyk, John Eric Tkaczyk
Rok vydání:	1995
Předmět:	Materials science Mechanical Engineering Nucleation Mineralogy Condensed Matter Physics Microstructure law.invention Chemical engineering Mechanics of Materials law General Materials Science Texture (crystalline) Critical current Crystallization Pyrolysis Grain orientation
Zdroj:	Journal of Materials Research. 10:2203-2210
ISSN:	2044-5326 0884-2914
DOI:	10.1557/jmr.1995.2203
Popis:	The electron backscattering pattern technique has been applied to the microstructural investigation of Tl(1223) thick films formed by vapor-phase thallination of Ag-containing Ba–Ca–Cu–oxide precursors. For samples grown on polycrystalline YSZ, considerable biaxial alignment is found in localized, multigrain regions as wide a 100 μm or more. However, on scales above 1 mm the overall texture remains only uniaxial with the c-axes (i.e., [001]) aligned perpendicular to the plane of the substrate. On single-crystal KTaO3 an epitaxial relationship is evident which persists to the surface of a 3 μm thick film. Modest variations in the processing protocol yield films containing grains oriented with the c-axis in the plane, resulting in the degradation of transport properties. The data suggest a growth mode in which sparse nucleation occurs at the substrate followed by rapid lateral crystallization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ebffac504e6dab3a0018e67fbd6f37b1 https://doi.org/10.1557/jmr.1995.2203 Zobrazit plný text záznamu Full text from SpringerLink