Phase transition and formation of TiSi2 codeposited on atomically clean Si(111)

Hyeongtag Jeon, Y. S. Cho, E. Y. Kang, J. W. Park, R. J. Nemanich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

In this study, the phase transformation and the surface and interface morphologies of TiSi2 formed on atomically clean Si substrates are investigated. 200 angstroms Ti and 400 angstroms Si films on Si(111) have been co-deposited at elevated temperatures (400 °C-800 °C) in ultrahigh vacuum. The phase transition of TiSi2 is characterized with using XRD. The results distinguish the formation of the C49 and C54 crystalline titanium silicides. The surface and interface morphologies of titanium silicides have been examined with SEM and TEM. A relatively smooth surface is observed for the C49 phase while a rough surface and interface are observed for the C54 phase. The islanding of the C54 phase becomes severe at high temperature (800 °C). Islands of TiSi2 have been observed at temperatures above 700 °C but no islands are observed at temperatures below 600 °C. For films deposited at 400 °C and 500 °C, weak XRD peaks corresponding to TiSi were observed and TEM micrographs exhibited small crystalline regions of titanium silicide at the interface.

Original languageEnglish (US)
Title of host publicationThermodynamics and Kinetics
PublisherPubl by Materials Research Society
Pages275-280
Number of pages6
ISBN (Print)1558992073, 9781558992078
DOIs
StatePublished - 1993
Externally publishedYes
EventProceedings of the Symposium on Phase Transformations in Thin Films - San Francisco, CA, USA
Duration: Apr 13 1993Apr 15 1993

Publication series

NameMaterials Research Society Symposium Proceedings
Volume311
ISSN (Print)0272-9172

Other

OtherProceedings of the Symposium on Phase Transformations in Thin Films
CitySan Francisco, CA, USA
Period4/13/934/15/93

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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