Abstract
The results of studying the velocity of hypersonic longitudinal acoustic phonons over a wide temperature range under an applied constant electric field in the PbMg1/3Nb2/3O3 (PMN) relaxor ferroelectric are reported. An analysis of the experimental data on the basis of the existing E-T phase diagrams shows the necessity of a substantial change in the current concepts. Two radically different states—with the reversible and irreversible behavior of velocity—have been observed experimentally in the induced ferroelectric phase. A modified E-T phase diagram of the PMN crystal is suggested.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 79, No. 11, 2004, pp. 686–690.
Original Russian Text Copyright © 2004 by Lushnikov, Ko, Seiji Kojima.
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Lushnikov, S.G., Ko, JH. & Kojima, S. E-T phase diagram of lead magnesium niobate relaxor ferroelectric in the Mandelstam-Brillouin scattering spectra. Jetp Lett. 79, 555–558 (2004). https://doi.org/10.1134/1.1787105
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DOI: https://doi.org/10.1134/1.1787105