title: Orthorhombic polar Nd-doped BiFeO3 thin film on MgO substrate.
abstract: A Nd-doped BiFeO(3) thin film deposited on MgO substrate was studied by synchrotron diffraction. The ferroelectric nature of the film is proven by in-plane remanent polarization measurement. The highest possible symmetry of the film is determined to be orthorhombic, within the Fm2m space group. Such a structure is rotated by 45° with respect to the substrate and is consistent with tilts of oxygen octahedra doubling the unit cell. This polar structure presents a rather unusual strain-accommodation mechanism.
authors.affiliation: Laboratoire Structures, Propriétés et Modélisation des Solides, UMR CNRS-École Centrale Paris, 92295 Châtenay-Malabry Cedex, France. i.leontiev@rambler.ru
authors.forename: I N
authors.initials: IN
authors.lastname: Leontyev
authors.forename: Yu I
authors.initials: YI
authors.lastname: Yuzyuk
authors.forename: P-E
authors.initials: PE
authors.lastname: Janolin
authors.forename: M
authors.initials: M
authors.lastname: El-Marssi
authors.forename: D
authors.initials: D
authors.lastname: Chernyshov
authors.forename: V
authors.initials: V
authors.lastname: Dmitriev
authors.forename: Yu I
authors.initials: YI
authors.lastname: Golovko
authors.forename: V M
authors.initials: VM
authors.lastname: Mukhortov
authors.forename: B
authors.initials: B
authors.lastname: Dkhil
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D008277:Magnesium Oxide / Q000737:chemistry*; D008956:Models, Chemical; D009354:Neodymium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D005290:Ferric Compounds; D009354:Neodymium; D008277:Magnesium Oxide; C033301:bismuth oxide; D001729:Bismuth