TY - JOUR
T1 - Morphology of phase-separated VO2 films deposited on TiO2-(001) substrate
AU - Cho, Youngji
AU - Aritomi, Shodai
AU - Kanki, Teruo
AU - Kinoshita, Koichi
AU - Endo, Noriaki
AU - Kondo, Yukihito
AU - Shindo, Daisuke
AU - Tanaka, Hidekazu
AU - Murakami, Yasukazu
N1 - Funding Information:
The authors are grateful to Mr. T. Yamamoto and Professor M. Tanaka for useful discussions. This study was supported by JST CREST (JPMJCR1664), JSPS KAKENHI (JP15H04112), and the research program Five-star Alliance in NJRC Mater. & Dev. (20174021).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/6
Y1 - 2018/6
N2 - 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.
AB - 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.
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U2 - 10.1016/j.materresbull.2018.02.030
DO - 10.1016/j.materresbull.2018.02.030
M3 - Article
AN - SCOPUS:85042687135
SN - 0025-5408
VL - 102
SP - 289
EP - 293
JO - Materials Research Bulletin
JF - Materials Research Bulletin
ER -