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.
Revised: August 18, 2014 |
Published: August 9, 2011
Citation
Qiao L., T.C. Droubay, M.E. Bowden, V. Shutthanandan, T.C. Kaspar, and S.A. Chambers. 2011.LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy.Applied Physics Letters 99, no. 6:Art. No. 061904.PNNL-SA-80732.doi:10.1063/1.3624473