Insight on the ferroelectric properties in a (BiFeO3)2(SrTiO3)4 superlattice from experiment and ab initio calculations

被引：11

作者：

Bruyer, E. ^{[1
,3
]}

Sayede, A. ^{[1
,3
]}

Ferri, A. ^{[1
]}

Desfeux, R. ^{[1
]}

Mangalam, R. V. K. ^{[2
]}

Ranjith, R. ^{[2
]}

Prellier, W. ^{[2
]}

机构：

[1] Univ Artois, Unite Catalyse & Chim Solide, CNRS UMR 8181, Fac Sci Jean Perrin, F-62300 Lens, France

[2] ENSICAEN, CNRS UMR 6508, Lab CRISMAT, F-14050 Caen, France

[3] Univ Lille Nord France, F-59000 Lille, France

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 04期

关键词：

BILBAO CRYSTALLOGRAPHIC SERVER; AUGMENTED-WAVE METHOD; THIN-FILMS; POLARIZATION; BIFEO3; PHASE; SRTIO3;

D O I：

10.1063/1.4927600

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ferroelectric domain properties of a (BiFeO3)(2)(SrTiO3)(4) superlattice were studied by means of piezoresponse force microscopy and density functional theory calculations. A combination of out-of-plane and in-plane piezoresponse force imaging confirms that the ferroelectric domains are oriented along the out-of-plane [001] direction of the film. Density functional theory calculations evidence that this orientation is due to the tetragonal-like structure adopted by the BiFeO3 units inside the superlattice in response to the interfacial strains. In addition, antiferrodistortive rotations of the BO2 planes within both types of ABO(3) blocks (i.e., SrTiO3 as well as BiFeO3 units) are highlighted. Besides, a much lower coercive voltage is measured on superlattices compared to BiFeO3 single layers, suggesting a more reliable switching capability. The results are expected to enable the design of promising multifunctional oxide superlattices. (C) 2015 AIP Publishing LLC.

引用

页数：5

共 38 条

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