Journal ArticleDOI
Polarization rotation mechanism for ultrahigh electromechanical response in single-crystal piezoelectrics
Huaxiang Fu,Ronald E. Cohen +1 more
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TLDR
It is shown that a large piezoelectric response can be driven by polarization rotation induced by an external electric field, and the computations suggest how to design materials with better performance, and may stimulate further interest in the fundamental theory of dielectric systems in finite electric fields.Abstract:
Piezoelectric materials, which convert mechanical to electrical energy (and vice versa), are crucial in medical imaging, telecommunication and ultrasonic devices. A new generation of single-crystal materials, such as Pb(Zn1/3Nb2/3)O3-PbTiO3 (PZN-PT) and Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT), exhibit a piezoelectric effect that is ten times larger than conventional ceramics, and may revolutionize these applications. However, the mechanism underlying the ultrahigh performance of these new materials-and consequently the possibilities for further improvements-are not at present clear. Here we report a first-principles study of the ferroelectric perovskite, BaTiO3, which is similar to single-crystal PZN-PT but is a simpler system to analyse. We show that a large piezoelectric response can be driven by polarization rotation induced by an external electric field. Our computations suggest how to design materials with better performance, and may stimulate further interest in the fundamental theory of dielectric systems in finite electric fields.read more
Citations
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Journal ArticleDOI
Re-entrant-like relaxor behaviour in the new 0.99BaTiO(3)-0.01AgNbO(3) solid solution.
Chao Lei,Zuo-Guang Ye +1 more
TL;DR: The relaxor state occurs after the paraelectric to ferro electric phase transition upon cooling, i.e., inside the ferroelectric phase, indicating a re-entrant-like phenomenon.
Journal ArticleDOI
Electric field induced magnetic anisotropy transition from fourfold to twofold symmetry in (001) 0.68Pb(Mg1/3Nb2/3)O3-0.32PbTiO3/Fe0.86Si0.14 epitaxial heterostructures
Xiaobin Guo,Xuemeng Han,Yalu Zuo,Junwei Zhang,Dong Li,Baoshan Cui,Kai Wu,Jijun Yun,Tao Wang,Yong Peng,Li Xi +10 more
TL;DR: In this paper, the epitaxial growth of FeSi film on (001) 0.68Pb(Mg1/3Nb2/3)O3-0.32PT was fabricated by sputtering and confirmed by high-resolution transmission electron microscopy.
Journal ArticleDOI
Electric-field effects of dielectric and optical properties in Pb(Mg1∕3Nb2∕3)0.65Ti0.35O3 crystal
TL;DR: In this paper, the authors measured the dielectric properties and domain structure in a (001)-oriented Pb(Mg1∕3Nb2∕ 3)065Ti035O3 (PMNT35%) single crystal with and without a prior dc electric (E)-field poling.
Journal ArticleDOI
Mechanical confinement for tuning ferroelectric response in PMN-PT single crystal
TL;DR: In this paper, compressive pre-stresses were used to tune and enhance the ferroelectric properties of 68Pb(Mn1/3Nb2/3)O3-32PbTiO3 (PMN-PT) single crystals.
Posted Content
Brillouin scattering and molecular dynamics study of the elastic properties of Pb(Mg1/3Nb2/3)O3
Muhtar Ahart,Aravind Asthagiri,Zuo-Guang Ye,Przemyslaw Dera,Ho-kwang Mao,Ronald E. Cohen,Russell J. Hemley +6 more
TL;DR: In this paper, the authors report the complete set of elastic constants and the bulk modulus for single crystal Pb(Mg1/3Nb2/3)O3 (PMN) at room temperature obtained from Brillouin spectroscopy and molecular dynamics simulations.
References
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Book
Principles and Applications of Ferroelectrics and Related Materials
TL;DR: In this paper, the theory of ferroelectricity in terms of soft modes and lattice dynamics is developed and modern techniques of measurement, including X-ray, optic, and neutron scattering, infra-red absorption, and magnetic resonance.
Journal ArticleDOI
Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals
Seung Eek Park,Thomas R. Shrout +1 more
TL;DR: In this article, the piezoelectric properties of relaxor based ferroelectric single crystals, such as Pb(Zn1/3Nb2/3)O3 and PbTiO3, were investigated for electromechanical actuators.
Journal ArticleDOI
Theory of polarization of crystalline solids
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Journal ArticleDOI
Origin of ferroelectricity in perovskite oxides
TL;DR: In this paper, the authors report results of electronic-structure calculations on two classic examples of ferroelectric perovskites, BaTiO3 and PbTiO2, and demonstrate that hybridization between the titanium 3d states and the oxygen 2p states is essential for ferroelectivity.
Journal ArticleDOI
Macroscopic polarization in crystalline dielectrics : the geometric phase approach
TL;DR: In this paper, King-Smith and Vanderbilt developed a complete theory in which the polarization difference between any two crystal states in a null electric field takes the form of a geometric quantum phase.
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