Grain size effect on the nonlinear dielectric properties of barium titanate ceramics

被引：103

作者：

Curecheriu, Lavinia ^{[1
]}

Buscaglia, Maria Teresa ^{[2
]}

Buscaglia, Vincenzo ^{[2
]}

Zhao, Zhe ^{[3
]}

Mitoseriu, Liliana ^{[1
]}

机构：

[1] Alexandru Ioan Cuza Univ, Dept Phys, Iasi 700506, Romania

[2] CNR, Inst Energet & Interphases IENI, I-16149 Genoa, Italy

[3] Univ Stockholm, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 24期

关键词：

THIN-FILMS; BATIO3; TUNABILITY; BEHAVIOR; VOLTAGE;

D O I：

10.1063/1.3526375

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The nonlinear dielectric properties of dense BaTiO3 ceramics with grain size of 1 mu m-90 nm were investigated. In the finest ceramics, the permittivity reduces below 1000 and a remarkable nonhysteretic linear dc-tunability [epsilon(E)] is obtained at high field, above 40 kV/cm. The observed behavior was explained by considering the nanostructured ceramic as a composite formed by ferroelectric grains, whose nonlinearity is reducing, and by low-permittivity nonferroelectric grain boundaries, whose volume fraction increases when decreasing the grain size. Reducing the grain size in ferroelectric dense materials is an alternative route to accomplish the application requirements: nonhysteretic tunability and permittivity below 1000. (C) 2010 American Institute of Physics. [doi:10.1063/1.3526375]

引用

页数：3

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