Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi0.85Nd0.15)(Ti0.1Fe0.9)O3
Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi0.85Nd0.15)(Ti0.1Fe0.9)O3
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DOI：
10.1063/1.4818002
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发表时间：
2013-08
期刊：
影响因子：
6.1
通讯作者：
I. MacLaren;Liqiu Wang;Owen P Morris;A. Craven;R. Stamps;B. Schaffer;Q. Ramasse;S. Miao;K. Kalantari;I. Sterianou;I. Reaney
中科院分区：
文献类型：
--
作者：
I. MacLaren;Liqiu Wang;Owen P Morris;A. Craven;R. Stamps;B. Schaffer;Q. Ramasse;S. Miao;K. Kalantari;I. Sterianou;I. Reaney
本文报道了在（Bi_（0.85）Nd_（0.15））（Ti_（0.1）Fe_（0.9））O_3晶体中观察到的一种不寻常的负电荷反相界。使用像差校正的扫描透射电子显微镜来建立该边界的完整三维结构，包括0-离子位置至10 μ m ±10 μ m。带电的反相边界稳定四边形扭曲的区域与强极性订购的边界的任何一侧，与特征长度尺度确定的过剩电荷被困在边界处。远离边界的晶体弛豫成众所周知的Nd稳定的反铁电相。
Observation of an unusual, negatively-charged antiphase boundary in (Bi0.85Nd0.15)(Ti0.1Fe0.9)O3 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.