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Author Foong, F. ♦ Bedard, B. ♦ Xu, Q. L. ♦ Liou, S. H.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ BARIUM OXIDES ♦ SYNTHESIS ♦ CALCIUM OXIDES ♦ COPPER OXIDES ♦ HIGH-TC SUPERCONDUCTORS ♦ MERCURY OXIDES ♦ ANNEALING ♦ CRYSTAL STRUCTURE ♦ DOPED MATERIALS ♦ MICROSTRUCTURE ♦ MORPHOLOGY ♦ SPUTTERING ♦ THALLIUM ADDITIONS ♦ THIN FILMS ♦ TRANSITION TEMPERATURE ♦ FILM GROWTH
Abstract Thin films with mostly (Hg,Tl){sub 1}Ba{sub 2}Ca{sub 3}Cu{sub 2}O{sub 8+{delta}} [(Hg,Tl)-1223] phase have been fabricated by radio frequency magnetron sputtering of precursor films and post-annealing method. The doping of a small amount of thallium in the film is helpful to the formation of the three-layer CuO{sub 2} compound. These films have a highly oriented structure with the {ital c}-axis perpendicular to the film surface. Resistivity measurements show that the films after annealing at 300{degree}C for 1 h in O{sub 2} have the superconducting transition temperature of {ital T}{sub {ital c}}(onset)=133 K and {ital T}{sub {ital c}}(zero)=127 K. Scanning electron micrographs of the film reveal platelike micrometer-size grains coalesce to cover the substrate surface. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-02-01
Publisher Department Purdue Research Foundation
Publisher Place United States
Journal Applied Physics Letters
Volume Number 68
Issue Number 8
Organization Purdue Research Foundation


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