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arXiv · 1105.4290

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
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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 Å. 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.

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L. Qiao, T. C. Droubay, M. E. Bowden, V. Shutthanandan, T. C. Kaspar, S. A. Chambers. 2011-05-21. LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy. https://doi.org/10.1063/1.3624473

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