Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi0.85Nd0.15)(Ti0.1Fe0.9)O3

MacLaren, I. et al. (2013) Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi0.85Nd0.15)(Ti0.1Fe0.9)O3. APL Materials, 1(2), 021102. (doi: 10.1063/1.4818002)

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Publisher's URL: http://dx.doi.org/10.1063/1.4818002


Observation of an unusual, negatively-charged antiphase boundary in (Bi<sub>0.85</sub>Nd<sub>0.15</sub>)(Ti<sub>0.1</sub>Fe<sub>0.9</sub>)O<sub>3</sub> is reported. Aberration corrected scanning transmission electron microscopy is used to establish the full three dimensional structure of this boundary including O-ion positions to ~ ± 10 pm. The charged antiphase boundary stabilises tetragonally distorted regions with a strong polar ordering to either side of the boundary, with a characteristic length scale determined by the excess charge trapped at the boundary. Far away from the boundary the crystal relaxes into the well-known Nd-stabilised antiferroelectric phase.

Item Type:Articles (Letter)
Glasgow Author(s) Enlighten ID:Wang, Ms Liqiu and Stamps, Professor Robert and Schaffer, Dr Bernhard and Morris, Mr Owen and MacLaren, Dr Ian and Craven, Professor Alan
Authors: MacLaren, I., Wang, L., Morris, O., Craven, A., Stamps, R., Schaffer, B., Ramasse, Q., Miao, S., Kalantari, K., Sterianou, I., and Reaney, I.
College/School:College of Science and Engineering > School of Physics and Astronomy > Kelvin Nanocharacterisation Centre
Research Group:Materials and Condensed Matter Physics
Journal Name:APL Materials
Journal Abbr.:APL Mater
Publisher:American Institute of Physics
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
539401Using aberration corrected STEM to study the atomic structure of incommensurate antiferroelectricsIan MaclarenEngineering & Physical Sciences Research Council (EPSRC)EP/I000879/1P&A - PHYSICS & ASTRONOMY