Morphology of phase-separated VO2 films deposited on TiO2-(001) substrate

Youngji Cho, Shodai Aritomi, Teruo Kanki, Koichi Kinoshita, Noriaki Endo, Yukihito Kondo, Daisuke Shindo, Hidekazu Tanaka, Yasukazu Murakami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The basic morphology of phase-separated VO2 films, in which the tetragonal (metallic) phase coexists with the monoclinic (insulating) phase, was studied using transmission electron microscopy. While the phase transformation temperature in an unstrained crystal is approximately 340 K, it was observed that at 298 K, elastic strain (caused by lattice mismatch with the TiO2-(001) substrate) stabilized the tetragonal phase near the VO2/TiO2 boundary. The observed zig-zag-shaped interface of the tetragonal phase was explained by the crystallographic orientation relationship between the tetragonal and monoclinic phases. The observations provide valuable information for future applications of VO2 films.

Original languageEnglish
Pages (from-to)289-293
Number of pages5
JournalMaterials Research Bulletin
Volume102
DOIs
Publication statusPublished - 2018 Jun

Keywords

  • A. Interfaces
  • A. Thin films
  • B. Phase transition
  • C. Transmission electron microscopy (TEM)

ASJC Scopus subject areas

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

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