Platinum enhanced textured growth of grain‐aligned YBa2Cu3O7−xthick films

Autor:	Jennifer A. Lewis, C. E. Platt, M. Wegmann
Rok vydání:	1994
Předmět:	Materials science Metallurgy Analytical chemistry General Physics and Astronomy chemistry.chemical_element Substrate (electronics) Microstructure law.invention chemistry Optical microscope Transition metal law Differential thermal analysis Texture (crystalline) Platinum FOIL method
Zdroj:	Journal of Applied Physics. 75:5218-5226
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.355719
Popis:	The effects of magnetic alignment, heat treatment, and substrate interactions on the microstructural development and properties of YBa2Cu3O7−x (Y123) thick films were studied. Aligned films were formed by vacuum filtrating a particulate suspension in a 7 T applied field. These films and nonaligned control films were fired on either platinum (Pt) foil or magnesium oxide (MgO) substrates to various maximum temperatures between 930 and 1040 °C. Optical microscopy revealed large differences in microstructural development between the various films. Aligned Y123 films fired on Pt foil exhibited the best microstructural properties. Via plasma emission spectroscopy and secondary ion mass spectroscopy, approximately 0.1 wt % Pt was found distributed throughout the films fired on platinum, while negligible amounts of Mg were detected in the films fired on MgO substrates. Differential thermal analysis revealed that, in the presence of Pt, the peritectic temperature (1030 °C for pure Y123 in O2) is reduced 70 °C, the...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28851476d144b4155e4f4947541612b2 https://doi.org/10.1063/1.355719 Zobrazit plný text záznamu