Cation vacancies in ferroelectric PbTiO3 and Pb(Zr,Ti)O3:: A positron annihilation lifetime spectroscopy study

被引：57

作者：

Keeble, D. J. ^{[1
]}

Singh, S. ^{[1
]}

Mackie, R. A. ^{[1
]}

Morozov, M. ^{[2
]}

McGuire, S. ^{[1
]}

Damjanovic, D. ^{[2
]}

机构：

[1] Univ Dundee, Sch Engn Phys Math, Carnegie Lab Phys, Dundee DD1 4HN, Scotland

[2] Swiss Fed Inst Technol, Ceram Lab, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.76.144109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Positron annihilation lifetime spectroscopy measurements identify A- and B-site cation vacancies in ferroelectric perovskite oxides (ABO(3)). Crystal PbTiO(3) and ceramic lead zirconium titanate (PZT) were studied and gave consistent values for the lifetime resulting from positron localization at lead vacancies V(Pb). Positron trapping to B-site vacancies was inferred in PZT. Temperature dependent studies showed that the defect specific trapping rate was higher for V(B) compared to V(Pb), consistent with the larger negative charge. Doping PZT with Fe increased the fraction positron trapping to V(B) compared to V(Pb)-type defects.

引用

页数：5

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