Microstructure and electrical conductivity of epitaxial CaRuO3 thin films prepared on (001), (110) and (111) SrTiO3 substrates by laser ablation

Akihiko Ito, Hiroshi Masumoto, Takashi Goto

研究成果: ジャーナルへの寄稿学術論文査読

11 被引用数 (Scopus)

抄録

CaRuO3 (CRO) thin films were prepared on SrTiO3 (STO) single-crystal substrates by laser ablation, and their microstructures and the effect of lattice misfit on electrical conductivity were investigated. Pseudo-cubic (001), (110) and (111) oriented CRO thin films were grown epitaxially with the in-plane relationships on (001), (110) and (111) STO substrates at an oxygen pressure of 13 Pa and a substrate temperature of 973 K, respectively. Epitaxial (001) thin films showed a flat and smooth surface with a terrace and step structure whereas (110) CRO thin film had a faceted pyramid-like structure. The (111) CRO thin film had a rough terrace and step structure with trigonal texture. The lattice expansion of CRO would cause the decrease of the electrical conductivity. Epitaxial (111) CRO thin films has good lattice consistency with (111) STO substrate, and exhibited the highest electrical conductivity of 1.5 × 105 S m-1 S among the (001), (110) and (111) CRO thin films.

本文言語英語
ページ(範囲)683-687
ページ数5
ジャーナルJournal of the Ceramic Society of Japan
115
1347
DOI
出版ステータス出版済み - 2007 11月

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