Piezoelectric enhancement of (PbTiO3)m/(BaTiO3)n ferroelectric superlattices through domain engineering

被引：18

作者：

Hong, Liang ^{[1
]}

Wu, Pingping ^{[1
,2
]}

Li, Yulan ^{[3
]}

Gopalan, Venkatraman ^{[1
]}

Eom, Chang-Beom ^{[4
]}

Schlom, Darrell G. ^{[5
,6
]}

Chen, Long-Qing ^{[1
]}

机构：

[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[2] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China

[3] Pacific NW Natl Lab, Richland, WA 99352 USA

[4] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

[5] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

[6] Cornell Univ, Kavli Inst Cornell Nanoscale Sci, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 17期

基金：

美国国家科学基金会;

关键词：

PHASE-FIELD MODEL; BATIO3; THIN-FILMS; SINGLE-CRYSTALS; STRAIN; BEHAVIOR;

D O I：

10.1103/PhysRevB.90.174111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase diagram of (PbTiO3)(m)/(BaTiO3)(n) ferroelectric superlattices was computed using the phase-field approach as a function of layer volume fraction and biaxial strain to tune ferroelectric properties through domain engineering. Two interesting domain structures are found: one with mixed Bloch-Neel-Ising domain wall structures and the other with stabilized monoclinic M-c phases. The polarization of the monoclinic M-c phase is able to rotate from out-of-plane to in-plane or vice versa under an electric field, and thus facilitates the domain reversal of rhombohedral domains. This contributes significantly to both reduced coercive fields and enhanced piezoelectric responses.

引用

页数：6

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