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
Marble game with optimal ferroelectric switching
TL;DR: It is found that the ferroelectric anisotropy exhibits 'hard' and 'easy' switching axes similar to magnetic materials, and a rotating electric field excitation is proposed in order to guide the polarization switching along a curved path.
Journal ArticleDOI
Monoclinic MB phase and phase instability in [110] field cooled Pb(Zn1/3Nb2/3)O3–4.5%PbTiO3 single crystals
TL;DR: Renault et al. as discussed by the authors reported the finding of a monoclinic M(B) phase in Pb(Zn(13)Nb(23))O(3)-4.5%PbTiO (3) single crystals.
Journal ArticleDOI
Contributions of domain wall motion to complex electromechanical coefficients of 0.62Pb(Mg1/3Nb2/3)O3–0.38PbTiO3 crystals
TL;DR: Experimental results indicate that for this system, domain wall motion contributes significantly to the imaginary parts of electromechanical coefficients, and PMN-38%PT single crystals have much larger mechanical loss factor compared to that of conventional single crystal like LiNbO(3).
Journal ArticleDOI
Critical triple point as the origin of giant piezoelectricity in PbMg1/3Nb2/3O3-PbTiO3 system
Shailendra Rajput,Xiaoqin Ke,Xinghao Hu,Minxia Fang,Dingyue Hu,Fan Ye,Yanshuang Hao,Xiaobing Ren,Xiaobing Ren +8 more
TL;DR: The morphotropic phase boundary of PbMg1/3Nb2/3O3-xPbTiO3 (PMN-xPT) and its derivatives has been reported to exhibit a giant piezoelectric coefficient (d33).
Journal ArticleDOI
In situ total strain measurements revealing the strain mechanism of Pb(Mg1/3Nb2/3)O3PbTiO3 single crystals
TL;DR: In this article, the authors investigated the correlation among longitudinal and transverse strains and the consequent volume change in PMN-PT and showed that seemingly different strain behavior of (001)- and (011)-oriented crystals has the same origin, and the underlying mechanism excludes possible contribution from the frequently cited polarization rotation.
References
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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
TL;DR: It is shown that physically $\ensuremath{\Delta}P can be interpreted as a displacement of the center of charge of the Wannier functions.
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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Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals
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