Self-regulated growth of LaVO3 thin films by hybrid molecular beam epitaxy

Hai Tian Zhang, Liv R. Dedon, Lane W. Martin, Roman Engel-Herbert

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

LaVO3 thin films were grown on SrTiO3 (001) by hybrid molecular beam epitaxy. A volatile metalorganic precursor, vanadium oxytriisopropoxide (VTIP), and elemental La were co-supplied in the presence of a molecular oxygen flux. By keeping the La flux fixed and varying the VTIP flux, stoichiometric LaVO3 films were obtained for a range of cation flux ratios, indicating the presence of a self-regulated growth window. Films grown under stoichiometric conditions were found to have the largest lattice parameter, which decreased monotonically with increasing amounts of excess La or V. Energy dispersive X-ray spectroscopy and Rutherford backscattering measurements were carried out to confirm film compositions. Stoichiometric growth of complex vanadate thin films independent of cation flux ratios expands upon the previously reported self-regulated growth of perovskite titanates using hybrid molecular beam epitaxy, thus demonstrating the general applicability of this growth approach to other complex oxide materials, where a precise control over film stoichiometry is demanded by the application.

Original languageEnglish (US)
Article number233102
JournalApplied Physics Letters
Volume106
Issue number23
DOIs
StatePublished - Jun 8 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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