Significant dielectric enhancement in 0.3BiFeO3-0.7SrBi2Nb2O9

被引：23

作者：

Gu, HS ^{[1
]}

Xue, JM ^{[1
]}

Wang, J ^{[1
]}

机构：

[1] Natl Univ Singapore, Fac Sci, Dept Mat Sci, Singapore 119260, Singapore

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 13期

关键词：

D O I：

10.1063/1.1405420

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Significant dielectric enhancement is observed in 0.3BiFeO(3)-0.7SrBi(2)Nb(2)O(9), when a single-phase layered perovskite structure was formed by sintering the mechanically activated oxide composition. The Curie point of xBiFeO(3)-(1-x)SrBi2Nb2O9 was shifted upward with an increase in the BiFeO3 content. 0.3BiFeO(3)-0.7SrBi(2)Nb(2)O(9) exhibits a dielectric constant of 1.84x10(5) at the Curie point of 750 degreesC. The lattice dimensions of xBiFeO(3)-(1-x)SrBi2Nb2O9 decrease slightly with an increase in the content of BiFeO3 over the composition range of x=0-0.2, while 0.3 mol BiFeO3 in SrBi2Nb2O9 led to recovery in the lattice dimensions. The much enhanced dielectric properties observed in 0.3BiFeO(3)-0.7SrBi(2)Nb(2)O(9) are therefore due to the enlarged rattling space for both Nb5+ and in particular for smaller Fe3+. (C) 2001 American Institute of Physics.

引用

页码：2061 / 2063

页数：3

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