Electrical properties of ferroelectric BiMnO3-PbTiO3 under tailored synthesis and ceramic processing

被引：13

作者：

Amorin, H. ^{[1
]}

Jimenez, R. ^{[1
]}

Vila, E. ^{[1
]}

Dolle, M. ^{[2
]}

Castro, A. ^{[1
]}

Alguero, M. ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

[2] CNRS, CEMES, F-31055 Toulouse, France

来源：

PHASE TRANSITIONS | 2013年 / 86卷 / 07期

关键词：

multiferroics; single-phase materials; perovskite structure; electrical properties; conductivity; CRYSTAL-STRUCTURE; SOLID-SOLUTION; BIMNO3; PEROVSKITES;

D O I：

10.1080/01411594.2012.730616

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Conductivity is a main issue in research on multiferroic perovskite oxides, which makes the characterization of their ferroelectric properties difficult, and for several compounds even to unambiguously state their ferroelectric nature. In this report, we use ferroelectric BiMnO3-PbTiO3 as a model system to study the relationships among synthesis, processing, and conductivity in ABO(3) perovskite oxides with magnetically active cations in the B-site. Three single phase, dense ceramic materials processed by conventional sintering, hot pressing, or spark plasma sintering (SPS) of powders synthesized by either wet chemistry or mechanochemical activation were studied. Impedance spectroscopy analysis was carried out to obtain grain and grain boundary conductivities for the three materials, along with activation energies. Mechanosynthesis is shown not to modify the mechanism of bulk or boundary conductivity, but only the carrier concentration, while SPS processing results in a low temperature, additional conduction mechanism.

引用

页码：681 / 694

页数：14

共 21 条

[1] High temperature piezoelectric BiScO3-PbTiO3 synthesized by mechanochemical methods [J].