Defect chemistry of Ti-doped antiferroelectric Bi0.85Nd0.15FeO3

被引：30

作者：

Reaney, Ian M. ^{[1
]}

MacLaren, Ian ^{[2
]}

Wang, Liqiu ^{[2
]}

Schaffer, Bernhard ^{[2
,3
]}

Craven, Alan ^{[2
]}

Kalantari, Kambiz ^{[1
]}

Sterianou, Iasmi ^{[1
]}

Miao, Shu ^{[1
]}

Karimi, Sarah ^{[1
]}

Sinclair, Derek C. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England

[2] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland

[3] SuperSTEM Lab, Warrington WA4 4AD, Cheshire, England

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 18期

基金：

英国工程与自然科学研究理事会;

关键词：

BISMUTH FERRITE; CERAMICS; CONDUCTIVITY; BIFEO3;

D O I：

10.1063/1.4705431

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Aberration corrected scanning transmission electron microscopy revealed that Bi0.85Nd0.15Fe0.9Ti0.1O3 ceramics contain coherent Nd-rich precipitates distributed throughout the perovskite lattice, implying charge compensation is obtained by the creation of V-Nd''' and not V-Bi'''. At low concentrations, therefore, Ti4+ replace Fe2+ with the creation of 2/3V(Nd)''', and at higher concentrations (when Fe2+ have been eliminated and the conductivity suppressed), Fe3+ with the creation of 1/3V(Nd)'''. The switch in ionic compensation mechanism from 2/3V(Nd)''' at low Ti concentrations (similar to 1%) to 1/3V(Nd)''' at higher concentrations (>1%) results in a decrease in the magnitude of Delta T-C/Delta x, as the disruption of long range anti-polar coupling declines. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705431]

引用

页数：3

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