LaCrO{sub 3} heteroepitaxy on SrTiO{sub 3}(001) by molecular beam epitaxy

Journal Article · Mon Aug 08 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3624473· OSTI ID:22027704

Qiao, L; Droubay, T C; Bowden, M E; Shutthanandan, V; Kaspar, T C; Chambers, S A ^[1]

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1. Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)

Stoichiometric, epitaxial LaCrO{sub 3} films have been grown on SrTiO{sub 3}(001) by molecular beam epitaxy using O{sub 2} as the oxidant. Films grew in a layer-by-layer fashion, giving rise to coherently strained, structurally excellent films and surfaces which preserve the step-terrace structure of the substrate. The critical thickness is in excess of 500 A. Cr(III) near the surface is easily oxidized to Cr(V) upon exposure to atomic oxygen and reduction back to Cr(III) is readily achieved by vacuum annealing, resulting in tunability of the charge state at the B-site cation.

• OSTI ID: 22027704
• Journal Information: Applied Physics Letters, Vol. 99, Issue 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CATIONS
CHARGE STATES
CHROMIUM OXIDES
CRYSTAL GROWTH
CRYSTAL STRUCTURE
HETEROJUNCTIONS
LANTHANUM COMPOUNDS
LAYERS
MOLECULAR BEAM EPITAXY
OXIDATION
OXYGEN
REDUCTION
STOICHIOMETRY
STRONTIUM TITANATES
SUBSTRATES
SURFACES
THICKNESS
THIN FILMS