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Crystallographic Domain Structure of an Epitaxial (Pr 0.7 Ca 0.3 )MnO 3 Thin Film Grown on a SrTiO 3 Single Crystal Substrate
Author(s) -
Fujimoto Masayuki,
Koyama Hiroshi,
Nishi Yuji,
Suzuki Toshimasa,
Kobayashi Shinji,
Tamai Yukio,
Awaya Nobuyoshi
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01686.x
Subject(s) - epitaxy , crystallography , substrate (aquarium) , materials science , thin film , crystal structure , perovskite (structure) , chemistry , layer (electronics) , nanotechnology , oceanography , geology
We characterized the structure of the crystallographic domain of a (Pr 0.7 Ca 0.3 )MnO 3 (PCMO ( x =0.3)) thin film epitaxially grown on a (001)SrTiO 3 (STO) single‐crystal substrate. We found that the domain structure exhibited an atomically smooth coherent interface with the STO substrate with no misfit dislocations. The crystallographic relationships between the domains and the substrate in their planes were interpreted to be PCMO ( x =0.3)[110][001]//STO[100][010] and PCMO ( x =0.3)[001][1‐10]//STO[100][010]. The domain structure of PCMO ( x =0.3)[110][1‐10]//STO[100][010] has less possibility of having the larger anisotropic strain energy found in a monoclinically distorted pseudo‐cubic perovskite unit cell of PCMO ( x =0.3). This epitaxial growth structure is totally different from the previously reported PCMO ( x =0.5) epitaxial thin‐film structure on STO substrate. Our observations suggested that an x value change strongly influences the structure of epitaxial PCMO thin films.