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Title: {ital C}-axis oriented (Hg,Ti)-based superconducting films with {ital T}{sub {ital c}}{approx_gt}125 K

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.}

Authors:
; ; ;  [1]
  1. Behler Laboratories of Physics and Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0111 (United States)
Publication Date:
Research Org.:
Purdue Univ., West Lafayette, IN (United States)
OSTI Identifier:
278628
DOE Contract Number:  
FG02-90ER45427
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 68; Journal Issue: 8; Other Information: PBD: Feb 1996
Country of Publication:
United States
Language:
English
Subject:
36 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

Citation Formats

Foong, F, Bedard, B, Xu, Q L, and Liou, S H. {ital C}-axis oriented (Hg,Ti)-based superconducting films with {ital T}{sub {ital c}}{approx_gt}125 K. United States: N. p., 1996. Web. doi:10.1063/1.115707.
Foong, F, Bedard, B, Xu, Q L, & Liou, S H. {ital C}-axis oriented (Hg,Ti)-based superconducting films with {ital T}{sub {ital c}}{approx_gt}125 K. United States. doi:10.1063/1.115707.
Foong, F, Bedard, B, Xu, Q L, and Liou, S H. Thu . "{ital C}-axis oriented (Hg,Ti)-based superconducting films with {ital T}{sub {ital c}}{approx_gt}125 K". United States. doi:10.1063/1.115707.
@article{osti_278628,
title = {{ital C}-axis oriented (Hg,Ti)-based superconducting films with {ital T}{sub {ital c}}{approx_gt}125 K},
author = {Foong, F and Bedard, B and Xu, Q L and Liou, S H},
abstractNote = {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.}},
doi = {10.1063/1.115707},
journal = {Applied Physics Letters},
number = 8,
volume = 68,
place = {United States},
year = {1996},
month = {2}
}