Strong dependence of dielectric properties on electrical boundary conditions and interfaces in ferroelectric superlattices

被引：19

作者：

Misirlioglu, I. B. ^{[1
]}

Kesim, M. T. ^{[2
,3
]}

Alpay, S. P. ^{[2
,3
,4
]}

机构：

[1] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey

[2] Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA

[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA

[4] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 02期

关键词：

THIN-FILMS; PHASE-TRANSITIONS; BATIO3/SRTIO3; SUPERLATTICES; MULTILAYERS; GROWTH;

D O I：

10.1063/1.4862408

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A computational study based on Landau-Ginzburg-Devonshire theory is carried out to understand the role of interfaces on the dielectric response of ferroelectric superlattices. Using heteroepitaxial (001) PbZr0.3Ti0.7O3/(001)SrTiO3 heterostructures on (001)SrTiO3 as an example, we show that electrostatic boundary conditions have a pronounced effect on the dielectric response far below the ferroelectric phase transition temperature. For a fixed total multilayer thickness, the average dielectric response can be improved significantly for superlattices with a small layer periodicity. This is due to the large total internal electric fields at the interlayer interfaces which originate from the polarization mismatch between layers. (C) 2014 AIP Publishing LLC.

引用

页数：5

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