LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy

L. Qiao; T. C. Droubay; M. E. Bowden; V. Shutthanandan; T. C. Kaspar; S. A. Chambers

doi:10.1063/1.3624473

LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy

Materials Science 2015-05-28 v1

Authors: L. Qiao , T. C. Droubay , M. E. Bowden , V. Shutthanandan , T. C. Kaspar , S. A. Chambers

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Abstract

Stoichiometric, epitaxial LaCrO3 films have been grown on TiO2-terminated SrTiO3(001) substrates by molecular beam epitaxy using O2 as the oxidant. Film growth occurred in a layer-by-layer fashion, giving rise to structurally excellent films and surfaces which preserve the step-terrace structure of the substrate. The critical thickness is in excess of 500 {\AA}. Near-surface Cr(III) is highly susceptible to further oxidation to Cr(V), leading to the formation of a disordered phase upon exposure to atomic oxygen. Recovery of the original epitaxial LaCrO3 phase is readily achieved by vacuum annealing.

Keywords

LaCrO3 heteroepitaxy SrTiO3(001) molecular beam epitaxy layer-by-layer growth critical thickness vacuum annealing

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@article{arxiv.1105.4290,
  title  = {LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy},
  author = {L. Qiao and T. C. Droubay and M. E. Bowden and V. Shutthanandan and T. C. Kaspar and S. A. Chambers},
  journal= {arXiv preprint arXiv:1105.4290},
  year   = {2015}
}

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10 pages, 4 figures

LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy

Abstract

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