Organometallic chemical vapor deposition of highTcsuperconducting Bi‐Sr‐Ca‐Cu‐O films
作者:
Jiming Zhang,
Jing Zhao,
Henry O. Marcy,
Lauren M. Tonge,
Bruce W. Wessels,
Tobin J. Marks,
Carl R. Kannewurf,
期刊:
Applied Physics Letters
(AIP Available online 1989)
卷期:
Volume 54,
issue 12
页码: 1166-1168
ISSN:0003-6951
年代: 1989
DOI:10.1063/1.101481
出版商: AIP
数据来源: AIP
摘要:
Films of the highTcBi‐Sr‐Ca‐Cu‐O superconductor have been prepared by organometallic chemical vapor deposition using the volatile metalorganic precursors Cu(acetylacetonate)2, Sr(dipivaloylmethanate)2, and Ca(dipivaloylmethanate)2, and triphenylbismuth. Deposition is carried out at 2 Torr with argon as the carrier gas and oxygen and water vapor as reactants. Film growth rates of 2–3 &mgr;m/h are achieved. After annealing under oxygen, energy dispersive x‐ray analysis and x‐ray diffraction data reveal that such films on [100] single‐crystal MgO consist predominantly of the Bi2(Sr,Ca)3Cu2Ox,Tc=85 K, phase and have preferential orientation of the crystallitecaxes perpendicular to the substrate surface. Four‐probe resistivity measurements reveal the onset of film superconductivity at ∼110 K and zero resistance by 75 K.
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