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Title: The atomic structure and chemistry of Fe-rich steps on antiphase boundaries in Ti-doped Bi{sub 0.9}Nd{sub 0.15}FeO{sub 3}

Stepped antiphase boundaries are frequently observed in Ti-doped Bi{sub 0.85}Nd{sub 0.15}FeO{sub 3}, related to the novel planar antiphase boundaries reported recently. The atomic structure and chemistry of these steps are determined by a combination of high angle annular dark field and bright field scanning transmission electron microscopy imaging, together with electron energy loss spectroscopy. The core of these steps is found to consist of 4 edge-sharing FeO{sub 6} octahedra. The structure is confirmed by image simulations using a frozen phonon multislice approach. The steps are also found to be negatively charged and, like the planar boundaries studied previously, result in polarisation of the surrounding perovskite matrix.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [3] ; ;  [4]
  1. SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom)
  2. (United Kingdom)
  3. SuperSTEM Laboratory, SciTech Daresbury, Keckwick Lane, Warrington WA4 4AD (United Kingdom)
  4. Department of Materials Science and Engineering, University of Sheffield, Mappin St, Sheffield S1 3JD (United Kingdom)
Publication Date:
OSTI Identifier:
22304481
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL Materials; Journal Volume: 2; Journal Issue: 6; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DOPED MATERIALS; ENERGY-LOSS SPECTROSCOPY; IRON OXIDES; PEROVSKITE; PHONONS; POLARIZATION; SIMULATION; TRANSMISSION ELECTRON MICROSCOPY