Single grain boundary characterization of Nb-doped SrTiO3 bicrystals using ac four-point impedance spectroscopy

被引：12

作者：

Hwang, JH ^{[1
]}

Johnson, KD ^{[1
]}

Mason, TO ^{[1
]}

Dravid, VP ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 18期

关键词：

D O I：

10.1063/1.126428

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

AC four-point impedance spectroscopy has been applied to Nb-doped SrTiO3 bicrystals. Due to the simplified geometry and highly conductive bulk of the bicrystal, the reference impedance of the electrode was significantly reduced, validating the applicability of ac four-point impedance spectroscopy for electroceramics. DC current-voltage characteristics without any interference due to electrodes confirmed these ac measurements. Using ac four-point impedance spectroscopy, grain boundary contributions are isolated and the corresponding grain boundary thickness and resistivity are estimated. (C) 2000 American Institute of Physics. [S0003-6951(00)00218-7].

引用

页码：2621 / 2623

页数：3

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