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Simultaneous Stress and Field Control of Sustainable Switching of Ferroelectric Phases.

Finkel P, Staruch M, Amin A, Ahart M, Lofland SE - Sci Rep (2015)

Bottom Line: Direct tuning of this effect through combination of stress and applied electric field, confirmed both macroscopically and microscopically with x-ray and Raman scattering, reveals the local symmetry while sweeping through the transition with a low applied electric field (<0.2 MV/m) under mechanical stress.The observed change in local symmetry as determined by x-ray scattering confirms a proposed polarization rotation mechanism corresponding to a transition between rhombohedral and orthorhombic phases.These results shed more light onto the nature of this reversible transformation between two ferroelectric phases and advance towards the development of a wide range of ferroic and multiferroic devices.

View Article: PubMed Central - PubMed

Affiliation: US Naval research Laboratory, Washington DC, 20375.

ABSTRACT
In ferroelectrics, manifestation of a strong electromechanical coupling is attributed to both engineered domain morphology and phase transformations. However, realization of large sustainable and reversible strains and polarization rotation has been limited by fatigue, nonlinearity and hysteresis losses. Here, we demonstrate that large strain and polarization rotation can be generated for over 40 × 10(6) cycles with little fatigue by realization of a reversible ferroelectric-ferroelectric phase transition in [011] cut Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) relaxor ferroelectric single crystal. Direct tuning of this effect through combination of stress and applied electric field, confirmed both macroscopically and microscopically with x-ray and Raman scattering, reveals the local symmetry while sweeping through the transition with a low applied electric field (<0.2 MV/m) under mechanical stress. The observed change in local symmetry as determined by x-ray scattering confirms a proposed polarization rotation mechanism corresponding to a transition between rhombohedral and orthorhombic phases. These results shed more light onto the nature of this reversible transformation between two ferroelectric phases and advance towards the development of a wide range of ferroic and multiferroic devices.

No MeSH data available.


Related in: MedlinePlus

Polarization rotation due to ferroelectric –ferroelectric rhombohedral (R) to orthorhombic (O) phase transformation in domain engineered ferroic crystal (a) Schematic of the formation of two polarization variants (P[111] and (P[−111]) and their switching from polydomain to monodomain under the application of a local electric field E (along [011]) and/or uniaxial compressive stresses σ (along [100]) above critical values Ec and σc.Reversible polarization switching results from the charged domain walls17.
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f1: Polarization rotation due to ferroelectric –ferroelectric rhombohedral (R) to orthorhombic (O) phase transformation in domain engineered ferroic crystal (a) Schematic of the formation of two polarization variants (P[111] and (P[−111]) and their switching from polydomain to monodomain under the application of a local electric field E (along [011]) and/or uniaxial compressive stresses σ (along [100]) above critical values Ec and σc.Reversible polarization switching results from the charged domain walls17.

Mentions: The reversibility of the stress-strain curve has been previously confirmed on a microscopic level with in-situ x-ray diffraction analysis19. However that study did not investigate simultaneous tuning of the transition under both stress and electric fields nor did it establish unequivocal evidence of a change in the local symmetry of the phases. The ferroelectric phase diagram near the MPB2021 is quite complex and unambiguous identification of the symmetry under various boundary conditions will help to resolve the complicated physics of these materials. In this work, we report on direct observation of reversible phase transitions as a function of electric field and stress in near-MPB [0 1 1] poled PIN-PMN-PT single crystals (PT ~ 29%), with geometry of the sample and applied fields shown in Fig. 1.


Simultaneous Stress and Field Control of Sustainable Switching of Ferroelectric Phases.

Finkel P, Staruch M, Amin A, Ahart M, Lofland SE - Sci Rep (2015)

Polarization rotation due to ferroelectric –ferroelectric rhombohedral (R) to orthorhombic (O) phase transformation in domain engineered ferroic crystal (a) Schematic of the formation of two polarization variants (P[111] and (P[−111]) and their switching from polydomain to monodomain under the application of a local electric field E (along [011]) and/or uniaxial compressive stresses σ (along [100]) above critical values Ec and σc.Reversible polarization switching results from the charged domain walls17.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4561888&req=5

f1: Polarization rotation due to ferroelectric –ferroelectric rhombohedral (R) to orthorhombic (O) phase transformation in domain engineered ferroic crystal (a) Schematic of the formation of two polarization variants (P[111] and (P[−111]) and their switching from polydomain to monodomain under the application of a local electric field E (along [011]) and/or uniaxial compressive stresses σ (along [100]) above critical values Ec and σc.Reversible polarization switching results from the charged domain walls17.
Mentions: The reversibility of the stress-strain curve has been previously confirmed on a microscopic level with in-situ x-ray diffraction analysis19. However that study did not investigate simultaneous tuning of the transition under both stress and electric fields nor did it establish unequivocal evidence of a change in the local symmetry of the phases. The ferroelectric phase diagram near the MPB2021 is quite complex and unambiguous identification of the symmetry under various boundary conditions will help to resolve the complicated physics of these materials. In this work, we report on direct observation of reversible phase transitions as a function of electric field and stress in near-MPB [0 1 1] poled PIN-PMN-PT single crystals (PT ~ 29%), with geometry of the sample and applied fields shown in Fig. 1.

Bottom Line: Direct tuning of this effect through combination of stress and applied electric field, confirmed both macroscopically and microscopically with x-ray and Raman scattering, reveals the local symmetry while sweeping through the transition with a low applied electric field (<0.2 MV/m) under mechanical stress.The observed change in local symmetry as determined by x-ray scattering confirms a proposed polarization rotation mechanism corresponding to a transition between rhombohedral and orthorhombic phases.These results shed more light onto the nature of this reversible transformation between two ferroelectric phases and advance towards the development of a wide range of ferroic and multiferroic devices.

View Article: PubMed Central - PubMed

Affiliation: US Naval research Laboratory, Washington DC, 20375.

ABSTRACT
In ferroelectrics, manifestation of a strong electromechanical coupling is attributed to both engineered domain morphology and phase transformations. However, realization of large sustainable and reversible strains and polarization rotation has been limited by fatigue, nonlinearity and hysteresis losses. Here, we demonstrate that large strain and polarization rotation can be generated for over 40 × 10(6) cycles with little fatigue by realization of a reversible ferroelectric-ferroelectric phase transition in [011] cut Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) relaxor ferroelectric single crystal. Direct tuning of this effect through combination of stress and applied electric field, confirmed both macroscopically and microscopically with x-ray and Raman scattering, reveals the local symmetry while sweeping through the transition with a low applied electric field (<0.2 MV/m) under mechanical stress. The observed change in local symmetry as determined by x-ray scattering confirms a proposed polarization rotation mechanism corresponding to a transition between rhombohedral and orthorhombic phases. These results shed more light onto the nature of this reversible transformation between two ferroelectric phases and advance towards the development of a wide range of ferroic and multiferroic devices.

No MeSH data available.


Related in: MedlinePlus