Spinodally decomposed nanostructures in a TiO2–VO2 crystal | Zendy

Zenji Hiroi | Zendy; Toru Yoshida | Zendy; J. Yamaura | Zendy; Yoshihiko Okamoto | Zendy

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Spinodally decomposed nanostructures in a TiO₂–VO₂ crystal

Author(s) -

Zenji Hiroi,

Toru Yoshida,

J. Yamaura,

Yoshihiko Okamoto

Publication year - 2015

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4919764

Subject(s) - materials science , monoclinic crystal system , spinodal decomposition , microstructure , electrical resistivity and conductivity , crystal structure , rutile , nanocrystalline material , crystal (programming language) , crystallography , anisotropy , phase transition , condensed matter physics , phase (matter) , nanotechnology , chemical engineering , optics , composite material , programming language , chemistry , physics , organic chemistry , engineering , computer science , electrical engineering

We have prepared a single crystal of Ti0.4V 0.6O2 which forms a solid solution crystallizing in the rutile structure at high temperatures and undergoes phase separation due to the spinodal decomposition when cooled to room temperature. The spinodally decomposed crystal consists of a self-assembled, mega stack of alternate Ti- and V-rich layers with an approximate period of 33 nm along the c axis. The unidirectional microstructure causes a large anisotropy in resistivity and a small one in thermal conductivity. A sharp metal–insulator transition as well as a structural transition to a monoclinic structure is observed in the thin V-rich layers

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