Effect of a Single Dislocation in a Heterostructure Layer on the Local Polarization of a Ferroelectric Layer

被引：80

作者：

Jia, C. L. ^{[1
,2
]}

Mi, S. B. ^{[1
,2
]}

Urban, K. ^{[1
,2
]}

Vrejoiu, I. ^{[3
]}

Alexe, M. ^{[3
]}

Hesse, D. ^{[3
]}

机构：

[1] Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Elect ER C, D-52425 Julich, Germany

[2] Forschungszentrum Julich, Inst Solid State Res, D-52425 Julich, Germany

[3] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 11期

关键词：

FILMS; SCALE;

D O I：

10.1103/PhysRevLett.102.117601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study, on an atomic scale, the influence of a single dislocation in a SrTiO3 sublayer on the local ferroelectric polarization of the neighboring ferroelectric PbZr0.2Ti0.8O3 (PZT) sublayer in an epitaxial SrTiO3/PbZr0.2Ti0.8O3/SrTiO3 three-layer heterostructure. The strain field of the dislocation in the SrTiO3 layer propagates across the interface into the PZT layer and leads to a strong variation of the c-lattice parameter of the PZT layer. Accompanying a strong reduction of the c-lattice parameter, the off-center displacements of the Zr/Ti atoms away from the center of the oxygen octahedra are also strongly decreased, resulting in a decrease of the local spontaneous polarization by up to 48%.

引用

页数：4

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