Highly tunable compositionally graded (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 multilayer with low temperature capacitance coefficients

被引：13

作者：

Bhardwaj, Chandan ^{[1
,2
]}

Daniel, B. S. S. ^{[3
]}

Kaur, Davinder ^{[1
,2
]}

机构：

[1] Indian Inst Technol Roorkee, Dept Phys, Funct Nanomat Res Lab, Roorkee 247667, Uttar Pradesh, India

[2] Indian Inst Technol Roorkee, Ctr Nanotechnol, Roorkee 247667, Uttar Pradesh, India

[3] Indian Inst Technol Roorkee, Dept Met & Mat Engn, Roorkee 247667, Uttar Pradesh, India

来源：

MATERIALS LETTERS | 2012年 / 87卷

关键词：

Ferroelectrics; Thin films; Physical vapor deposition;

D O I：

10.1016/j.matlet.2012.07.102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compositionally graded (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 {BCZT} thin films were deposited on LaNiO3 coated Si via the pulsed laser deposition technique to investigate permittivity temperature stability improvement. The results showed that the internal stress produced by the gradient of composition and different phase transition temperatures of constituent layers could be a dominant factor to influence the dielectric properties and temperature stability in different temperature regions. Graded film in the vicinity of morphotropic phase boundary displayed the highest tunability and the lowest temperature capacitance coefficient values. The maximum tunability of 63% and minimum temperature capacitance coefficient of 1.21 x 10(-4)degrees C had been observed in the graded multilayered films compared to the single-layer BCZT film prepared in the identical conditions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：172 / 175

页数：4

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