The high-temperature structure of lead magnoniobate

Vakhrushev, S. B.; Zhukov, S. G.; Fetisov, Gennady V.; Chernyshov, V. V.

doi:10.1088/0953-8984/6/22/001

Cited by 59 publications

(40 citation statements)

References 14 publications

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“…Namely, as was pointed out in Ref. 27 , a preferable direction of the Pb-shifts can be artificial because of insufficiently high values in (sin θ)/λ (note that we reached (sin θ max )/λ = 0.86Å −1 ). To our opinion, the quality of refinement for the different displacement directions depends on the associated degeneracies: six-fold for the <001>, eight-fold for <111> and twelve-fold for <110>.…”

Section: Resultsmentioning

confidence: 55%

“…From neutron and X-ray diffraction data, it is known that there is a general tendency that Pb displacements increase as the temperature decreases in complex perovskites (see e.g. 7,25,27 ). One can expect that the observed correlation between the DS intensity and the amplitudes of Pb displacements in PMT may help to create a model which describes short-range order in relaxors.…”

Section: B Possible Description Of the Dsmentioning

confidence: 99%

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Neutron scattering study of PbMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ and BaMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ complex perovskites

et al. 2004

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Neutron scattering investigations were carried out in PbMg 1/3 Ta 2/3 O3 and BaMg 1/3 Ta 2/3 O3 complex perovskites. The crystal structure of both compounds does not show any phase transition in the temperature range 1.5 -730 K. Whereas the temperature dependence of the lattice parameter of BaMg 1/3 Ta 2/3 O3 follows the classical expectations, the lattice parameter of relaxor ferroelectric PbMg 1/3 Ta 2/3 O3 exhibits anomalies. One of these anomalies is observed in the same temperature range as the peak in the dielectric susceptibility. We find that in PbMg 1/3 Ta 2/3 O3, lead ions are displaced from the ideal positions in the perovskite structure at all temperatures. Consequently short-range order is present. This induces strong diffuse scattering with an anisotropic shape in wavevector space. The temperature dependences of the diffuse neutron scattering intensity and of the amplitude of the lead displacements are similar.

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Section: Resultsmentioning

confidence: 55%

Section: B Possible Description Of the Dsmentioning

confidence: 99%

Neutron scattering study of PbMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ and BaMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ complex perovskites

et al. 2004

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“…4,16 The thermal evolution of PMR will give rise to a central peak in the Brillouin spectrum due to quasielastic scattering. Such a central peak has been observed by Brillouin scattering in parent relaxor ferroelectrics 1 and solid solutions.…”

Section: Resultsmentioning

confidence: 99%

Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3

Fan

Kuok

et al. 2002

Journal of Applied Physics

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Effects of the surface charge screening and temperature on the vortex domain patterns of ferroelectric nanodots J. Appl. Phys. 112, 104108 (2012) Unusual Urbach tail in TlGaSe2 ferroelectric-semiconductor with incommensurate phase J. Appl. Phys. 112, 103106 (2012) Dielectric and polarized Raman spectroscopic studies on 0.85Pb(Zn1/3Nb2/3)O3-0.15PbTiO3 single crystal J. Appl. Phys. 112, 073521 (2012) Structural change in polar nanoregion in alkali niobate added Pb(Zn1/3Nb2/3)0.95Ti0.05O3 single crystal and its effect on ferroelectric properties J. Appl. Phys. 112, 074109 (2012) Enhanced piezoelectric and antiferroelectric properties of high-TC perovskite of Zr-substituted Bi(Mg1/2Ti1/2)O3-PbTiO3 J. Appl. Phys. 112, 074101 (2012) Additional information on J. Appl. Phys.

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“…A high temperature X-ray structural study of PMN revealed the positional disorder of Pb 2+ at very high temperatures. 25) Therefore, this situation is possible for PZN. The view held by some authors in attributing the strong Raman modes in the cubic phase to second-order scattering can …”

Section: Raman Spectra At High Temperaturementioning

confidence: 99%

Raman Scattering of 0.91Pb(Zn_1/3Nb_2/3)O₃–0.09PbTiO₃Relaxor Ferroelectric Single Crystals

Jiang

Kojima

1999

Jpn. J. Appl. Phys.

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Raman spectra were measured for lead zinc niobate-lead titanate solid solution 0.91Pb(Zn1/3Nb2/3)O3–0.09PbTiO3 single crystals over a wide temperature range (-170–650°C) with different scattering geometry. Two phase changes were clearly observed by Raman scattering at the cubic to tetragonal (T C–T) and tetragonal to rhombohedral (T T–R) phase transition temperatures. The low-temperature transition related to the nanoregion behaviors has not been reported by other authors in the Raman scattering of other relaxor materials, and the mechanism was attributed to the increase in order at the B-site in 0.91PZN–0.09PT. High-temperature Raman spectra above T C–T with well-defined polarization are evidences that the Raman modes are mainly of the first order. The temperature dependence of the Raman modes above T C–T is due to the distorted space group of Fm3m associated with the positional disorder of Lead ion and the gradual disappearance of nanoregions with increasing temperature.

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The high-temperature structure of lead magnoniobate

Cited by 59 publications

References 14 publications

Neutron scattering study of PbMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ and BaMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ complex perovskites

Neutron scattering study of PbMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ and BaMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ complex perovskites

Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3

Raman Scattering of 0.91Pb(Zn_1/3Nb_2/3)O₃–0.09PbTiO₃Relaxor Ferroelectric Single Crystals

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The high-temperature structure of lead magnoniobate

Cited by 59 publications

References 14 publications

Neutron scattering study of PbMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ and BaMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ complex perovskites

Neutron scattering study of PbMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ and BaMg $_{\mathsf{1/3}}$Ta $_{\mathsf{2/3}}$O$_{\mathsf 3}$ complex perovskites

Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3

Raman Scattering of 0.91Pb(Zn1/3Nb2/3)O3–0.09PbTiO3Relaxor Ferroelectric Single Crystals

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Raman Scattering of 0.91Pb(Zn_1/3Nb_2/3)O₃–0.09PbTiO₃Relaxor Ferroelectric Single Crystals