Reaney, I. M., MacLaren, I. , Wang, L., Schaffer, B., Craven, A., Kalantari, K., Sterianou, I., Miao, S., Karimi, S. and Sinclair, D. C. (2012) Defect chemistry of Ti-doped antiferroelectric Bi0.85Nd0.15FeO3. Applied Physics Letters, 100(18), p. 182902. (doi: 10.1063/1.4705431)
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Publisher's URL: http://dx.doi.org/10.1063/1.4705431
Abstract
Aberration corrected scanning transmission electron microscopy revealed that Bi<sub>0.85</sub>Nd<sub>0.15</sub>Fe<sub>0.9</sub>Ti<sub>0.1</sub>O<sub>3</sub> ceramics contain coherent Nd-rich precipitates distributed throughout the perovskite lattice, implying charge compensation is obtained by the creation of V<sub>Nd</sub><sup>///</sup> and not V<sub>Bi</sub><sup>///</sup>. At low concentrations, therefore, Ti<sub>4+</sub> replace Fe<sub>2+</sub> with the creation of 2/3V<sub>Nd</sub><sup>///</sup>, and at higher concentrations (when Fe<sub>2+</sub> have been eliminated and the conductivity suppressed), Fe<sub>3+</sub> with the creation of 1/3V<sub>Nd</sub><sup>///</sup>. The switch in ionic compensation mechanism from 2/3V<sub>Nd</sub><sup>///</sup> at low Ti concentrations (∼1%) to 1/3V<sub>Nd</sub><sup>///</sup> at higher concentrations (>1%) results in a decrease in the magnitude of ΔTC/Δx, as the disruption of long range anti-polar coupling declines.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Wang, Ms Liqiu and Schaffer, Dr Bernhard and MacLaren, Dr Ian and Craven, Professor Alan |
Authors: | Reaney, I. M., MacLaren, I., Wang, L., Schaffer, B., Craven, A., Kalantari, K., Sterianou, I., Miao, S., Karimi, S., and Sinclair, D. C. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Applied Physics Letters |
Publisher: | American Institute of Physics |
ISSN: | 0003-6951 |
ISSN (Online): | 1077-3118 |
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