Structural and superconducting properties of artificially superstructured MoN‐TiN films
作者:
K. Kawaguchi,
S. Shin,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 67,
issue 2
页码: 921-929
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.345726
出版商: AIP
数据来源: AIP
摘要:
Superconducting artificially superstructured films (ASFs) composed of MoN and TiN have been prepared by an alternate reactive deposition method. Alternate layers of MoN and TiN were epitaxially grown on MgO(100) single‐crystal substrates. Those ASFs with the periodicities of [MoN(0.4 nm)/TiN(0.4nm)], [MoN(0.2 nm)/TiN(3.4 nm)], and [MoN(2.4 nm)/TiN(0.2 nm)] were successfully synthesized. It was confirmed that the precise thickness of ASFs could be controlled on the atomic level. Average lattice constants of ASFs were calculated from the positions of satellite peaks observed in x‐ray diffraction. Structural analyses indicate the formation of a singleB1‐MoN phase when conditions are optimized. ASFs containingB1‐MoN layers showed lower superconducting transition temperatures (Tc’s) than those of ASFs with &ggr;‐Mo2N. A few probable reasons for the lowerTcare discussed.
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