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Title: Origin of superstructures in (double) perovskite thin films

Abstract

We have investigated the origin of superstructure peaks as observed by X-ray diffraction of multiferroic Bi(Fe{sub 0.5}Cr{sub 0.5})O{sub 3} thin films grown by pulsed laser deposition on single crystal SrTiO{sub 3} substrates. The photon energy dependence of the contrast between the atomic scattering factors of Fe and Cr is used to rule out a chemically ordered double perovskite Bi{sub 2}FeCrO{sub 6} (BFCO). Structural calculations suggest that the experimentally observed superstructure occurs due to unequal cation displacements along the pseudo-cubic [111] direction that mimic the unit cell of the chemically ordered compound. This result helps to clarify discrepancies in the correlations of structural and magnetic order reported for Bi{sub 2}FeCrO{sub 6}. The observation of a superstructure in itself is not a sufficient proof of chemical order in double perovskites.

Authors:
; ; ; ; ; ; ;  [1]
  1. Institute of Materials Science, Technische Universität Darmstadt, 64287 Darmstadt (Germany)
Publication Date:
OSTI Identifier:
22306231
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 116; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH COMPOUNDS; CATIONS; CHROMIUM COMPOUNDS; CORRELATIONS; CRYSTAL STRUCTURE; ENERGY BEAM DEPOSITION; ENERGY DEPENDENCE; IRON COMPOUNDS; LASER RADIATION; MONOCRYSTALS; OXYGEN COMPOUNDS; PEROVSKITE; PHOTONS; PULSED IRRADIATION; STRONTIUM TITANATES; SUBSTRATES; THIN FILMS; X-RAY DIFFRACTION

Citation Formats

Shabadi, V., E-mail: shabadi@oxide.tu-darmstadt.de, Major, M., Komissinskiy, P., Vafaee, M., Radetinac, A., Baghaie Yazdi, M., Donner, W., and Alff, L., E-mail: alff@oxide.tu-darmstadt.de. Origin of superstructures in (double) perovskite thin films. United States: N. p., 2014. Web. doi:10.1063/1.4895636.
Shabadi, V., E-mail: shabadi@oxide.tu-darmstadt.de, Major, M., Komissinskiy, P., Vafaee, M., Radetinac, A., Baghaie Yazdi, M., Donner, W., & Alff, L., E-mail: alff@oxide.tu-darmstadt.de. Origin of superstructures in (double) perovskite thin films. United States. doi:10.1063/1.4895636.
Shabadi, V., E-mail: shabadi@oxide.tu-darmstadt.de, Major, M., Komissinskiy, P., Vafaee, M., Radetinac, A., Baghaie Yazdi, M., Donner, W., and Alff, L., E-mail: alff@oxide.tu-darmstadt.de. Sun . "Origin of superstructures in (double) perovskite thin films". United States. doi:10.1063/1.4895636.
@article{osti_22306231,
title = {Origin of superstructures in (double) perovskite thin films},
author = {Shabadi, V., E-mail: shabadi@oxide.tu-darmstadt.de and Major, M. and Komissinskiy, P. and Vafaee, M. and Radetinac, A. and Baghaie Yazdi, M. and Donner, W. and Alff, L., E-mail: alff@oxide.tu-darmstadt.de},
abstractNote = {We have investigated the origin of superstructure peaks as observed by X-ray diffraction of multiferroic Bi(Fe{sub 0.5}Cr{sub 0.5})O{sub 3} thin films grown by pulsed laser deposition on single crystal SrTiO{sub 3} substrates. The photon energy dependence of the contrast between the atomic scattering factors of Fe and Cr is used to rule out a chemically ordered double perovskite Bi{sub 2}FeCrO{sub 6} (BFCO). Structural calculations suggest that the experimentally observed superstructure occurs due to unequal cation displacements along the pseudo-cubic [111] direction that mimic the unit cell of the chemically ordered compound. This result helps to clarify discrepancies in the correlations of structural and magnetic order reported for Bi{sub 2}FeCrO{sub 6}. The observation of a superstructure in itself is not a sufficient proof of chemical order in double perovskites.},
doi = {10.1063/1.4895636},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 11,
volume = 116,
place = {United States},
year = {2014},
month = {9}
}