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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

Logarithmic representation of the reciprocal space maps of the cubic () reflection (a) at 0 MPa and (b) at 20 MPa.In (a), the sample is predominately rhombohedral and there are only two clear reflections, the main (220) reflection and the minor () one. In (b), the sample is in the orthorhombic state with the (040) the main reflection along with (400) reflection being observed. The small second peak indicates the presence of weak twinning. The fact that q3 is not zero is indicative of a small miscut in the sample.
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f3: Logarithmic representation of the reciprocal space maps of the cubic () reflection (a) at 0 MPa and (b) at 20 MPa.In (a), the sample is predominately rhombohedral and there are only two clear reflections, the main (220) reflection and the minor () one. In (b), the sample is in the orthorhombic state with the (040) the main reflection along with (400) reflection being observed. The small second peak indicates the presence of weak twinning. The fact that q3 is not zero is indicative of a small miscut in the sample.

Mentions: RSMs taken at σ = 0 and E = 0 displayed one dominant peak accompanied by one or more minor peaks, indicating the presence of some twinning (Fig. 3a). While a fully twinned R crystal has 8 degenerate variants, poling along the x3 axis breaks the symmetry such that ideally only two variants along [1,1,1] and [] (Fig. 1) should exist in the present crystal, and those two variants should be indistinguishable in this set of RSMs. Thus, these minor peaks suggest a small fraction of the variants with polarization in the x1-x2 plane of the sample. These could be due to insufficient field during poling to completely polarize the sample or a slight miscut in the sample surface. Nonetheless, below σc and Ec, as expected, the RSMs were found to be consistent with that of R structure (Table 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)

Logarithmic representation of the reciprocal space maps of the cubic () reflection (a) at 0 MPa and (b) at 20 MPa.In (a), the sample is predominately rhombohedral and there are only two clear reflections, the main (220) reflection and the minor () one. In (b), the sample is in the orthorhombic state with the (040) the main reflection along with (400) reflection being observed. The small second peak indicates the presence of weak twinning. The fact that q3 is not zero is indicative of a small miscut in the sample.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3: Logarithmic representation of the reciprocal space maps of the cubic () reflection (a) at 0 MPa and (b) at 20 MPa.In (a), the sample is predominately rhombohedral and there are only two clear reflections, the main (220) reflection and the minor () one. In (b), the sample is in the orthorhombic state with the (040) the main reflection along with (400) reflection being observed. The small second peak indicates the presence of weak twinning. The fact that q3 is not zero is indicative of a small miscut in the sample.
Mentions: RSMs taken at σ = 0 and E = 0 displayed one dominant peak accompanied by one or more minor peaks, indicating the presence of some twinning (Fig. 3a). While a fully twinned R crystal has 8 degenerate variants, poling along the x3 axis breaks the symmetry such that ideally only two variants along [1,1,1] and [] (Fig. 1) should exist in the present crystal, and those two variants should be indistinguishable in this set of RSMs. Thus, these minor peaks suggest a small fraction of the variants with polarization in the x1-x2 plane of the sample. These could be due to insufficient field during poling to completely polarize the sample or a slight miscut in the sample surface. Nonetheless, below σc and Ec, as expected, the RSMs were found to be consistent with that of R structure (Table 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