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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)683-687
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume115
Issue number1347
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • Calcium ruthenate
  • Conductive oxide
  • Electrical conductivity
  • Epitaxial growth
  • Laser ablation
  • Micro-structure
  • Thin films

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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