TITLE

Multilayer deposition of Tl-Ba-Ca-Cu-O films

AUTHOR(S)
Shih, I.; Qiu, C. X.
PUB. DATE
August 1988
SOURCE
Applied Physics Letters;8/8/1988, Vol. 53 Issue 6, p523
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Thin films of Tl-Ba-Ca-Cu-O with different atomic ratios and a thickness of about 2 μm have been prepared by a sequential thermal evaporation method on alumina substrates followed by a heat treatment in an environment containing O2 and Tl. The results showed that films with a superconducting onset temperature of about 120 K and a zero resistance temperature of 85 K can be obtained with the following Tl:Ca:Ba:Cu ratios: 2:2:2:3 or 2:2:2:4. Films with a superconducting transition onset at 115 K and a zero resistance temperature of 74 K were also obtained by heating Tl-free multilayer films in the environment containing O2 and Tl. It was also found that this new material was more resistant to water.
ACCESSION #
9827655

 

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