Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2819606
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REMnO3 (RE=Dy,Gd,Sm) films were deposited on (110) surfaces of single crystalline hexagonal (h-)YMnO3. These films adopted the metastable multiferroic h-REMnO3 structure instead of the stable perovskite structure. Sharp (hh0) diffraction peaks with narrow rocking curves were found for all films. The peak widths increased with increasing size of the rare-earth cation. The c-axis/a-axis lattice parameter decreased/increased monotonically with increasing rare-earth size for these epitaxial films. All films exhibited the following epitaxial relationship {110}(REMnO3)parallel to{110}(YMnO3);< 1 (1) over bar0 >(REMnO3)parallel to < 1 (1) over bar0 >(YMnO3). The single-phase hexagonal films were kinetically robust against back transformation to the stable perovskite structure even to thicknesses of 50 nm. (c) 2007 American Institute of Physics.
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