Anomalous pressure dependence of the atomic displacements in the relaxor ferroelectric PbMg$_{1/3}$Ta$_{2/3}$O$_3$

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dc.creatorGvasaliya, S. N.
dc.creatorPomjakushin, V.
dc.creatorRoessli, B.
dc.creatorStraessle, Th.
dc.creatorKlotz, S.
dc.creatorLushnikov, S. G.
dc.date2006-02-14
dc.date.accessioned2026-07-07T07:01:43Z
dc.date.available2026-07-07T07:01:43Z
dc.descriptionThe crystal structure of the PbMg$_{1/3}$Ta$_{2/3}$O$_3$ (PMT) relaxor ferroelectric was studied under hydrostatic pressure up to $\sim 7$ GPa by means of powder neutron diffraction. We find a drastic pressure-induced decrease of the lead displacement from the inversion centre which correlates with an increase by $\sim$ 50 % of the anisotropy of the oxygen temperature factor. The vibrations of the Mg/Ta are, in contrast, rather pressure insensitive. We attribute these changes being responsible for the previously reported pressure-induced suppression of the anomalous dielectric permittivity and diffuse scattering in relaxor ferroelectrics.
dc.identifierhttps://arxiv.org/abs/cond-mat/0602339
dc.identifierhttp://arxiv.org/abs/cond-mat/0602339
dc.identifierPhys. Rev. B 73, 212102 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.212102
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108360
dc.subjectMaterials Science
dc.titleAnomalous pressure dependence of the atomic displacements in the relaxor ferroelectric PbMg$_{1/3}$Ta$_{2/3}$O$_3$
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