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Electron beam flash evaporation for YBaCuO and BiCaSrCuO thin filmsAn electron beam flash evaporation technique is described which reproduces the stoichiometry of superconducting YBa(2)Cu(3)O(x) (123), Bi(2)CaSr(2)Cu(2)O(y) (2122), and Bi(2)Ca(2)Sr(2)Cu(3)O(z) (2223) source powders. Films of each material deposited with this technique exhibit zero resistance temperatures of 78 K or above when furnace annealed; 75 K zero temperatures are obtained for 123 films in situ annealed with atomic oxygen at 775 C. Transport critical current densities are 10,000 A/sq cm in 25-micron stripes patterned from 123 films, and 60,000 A/sq cm in 1-mm stripes of 2122 and 2223 films using a 1-microV/mm measurement criteria. Typical normal state resistivities are 700 micro-ohm cm for 2122 and 2223 films and 5 micro-ohm cm for 123 films. The 2122 films are highly textured with the c axis normal to the substrate. All results are for films deposited on MgO.
Document ID
19900028638
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Davis, Matthew F.
(Houston Univ. TX, United States)
Wosik, Jaroslaw L.
(Houston Univ. TX, United States)
Wolfe, J. C.
(Houston, University TX, United States)
Date Acquired
August 14, 2013
Publication Date
November 15, 1989
Publication Information
Publication: Journal of Applied Physics
Volume: 66
ISSN: 0021-8979
Subject Category
Solid-State Physics
Accession Number
90A15693
Funding Number(s)
CONTRACT_GRANT: NAG9-27
CONTRACT_GRANT: MDA972-88-G-0002
CONTRACT_GRANT: NSF MSM-87-18776
Distribution Limits
Public
Copyright
Other

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