Hypersonic frequency softening and relaxation in relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3-0.2PbTiO3

M. H. Kuok; S. C. Ng; H. J. Fan; M. Iwata; Y. Ishibashi

doi:10.1016/S0038-1098(01)00081-3

Hypersonic frequency softening and relaxation in relaxor ferroelectric 0.8Pb(Zn_1/3Nb_2/3)O₃-0.2PbTiO₃

M. H. Kuok^*, S. C. Ng, H. J. Fan, M. Iwata, Y. Ishibashi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Brillouin scattering from relaxor ferroelectric 0.8Pb(Zn_1/3Nb_2/3)O₃-0.2PbTiO₃ has been measured in the 300-723 K temperature range. A sharp ferroelectric phase transition from cubic to tetragonal symmetry, associated with a phonon frequency dip and a Landau-Khalatnikov-like damping maximum, has been observed near 528 K. Evidence for a relaxation mode in the form of a broad Rayleigh wing, whose frequency is strongly temperature dependent above 528 K, is found. The relaxation time and frequency are evaluated based on the tunneling model and a modified-superparaelectric model, respectively.

Original language	English
Pages (from-to)	169-172
Number of pages	4
Journal	Solid State Communications
Volume	118
Issue number	4
DOIs	https://doi.org/10.1016/S0038-1098(01)00081-3
Publication status	Published - Apr 24 2001
Externally published	Yes

ASJC Scopus Subject Areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. Ferroelectrics
D. Phase transitions
E. Inelastic light scattering

Access to Document

10.1016/S0038-1098(01)00081-3

Cite this

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title = "Hypersonic frequency softening and relaxation in relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3-0.2PbTiO3",

abstract = "Brillouin scattering from relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3-0.2PbTiO3 has been measured in the 300-723 K temperature range. A sharp ferroelectric phase transition from cubic to tetragonal symmetry, associated with a phonon frequency dip and a Landau-Khalatnikov-like damping maximum, has been observed near 528 K. Evidence for a relaxation mode in the form of a broad Rayleigh wing, whose frequency is strongly temperature dependent above 528 K, is found. The relaxation time and frequency are evaluated based on the tunneling model and a modified-superparaelectric model, respectively.",

keywords = "A. Ferroelectrics, D. Phase transitions, E. Inelastic light scattering",

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language = "English",

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T1 - Hypersonic frequency softening and relaxation in relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3-0.2PbTiO3

AU - Kuok, M. H.

AU - Ng, S. C.

AU - Fan, H. J.

AU - Iwata, M.

AU - Ishibashi, Y.

PY - 2001/4/24

Y1 - 2001/4/24

N2 - Brillouin scattering from relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3-0.2PbTiO3 has been measured in the 300-723 K temperature range. A sharp ferroelectric phase transition from cubic to tetragonal symmetry, associated with a phonon frequency dip and a Landau-Khalatnikov-like damping maximum, has been observed near 528 K. Evidence for a relaxation mode in the form of a broad Rayleigh wing, whose frequency is strongly temperature dependent above 528 K, is found. The relaxation time and frequency are evaluated based on the tunneling model and a modified-superparaelectric model, respectively.

AB - Brillouin scattering from relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3-0.2PbTiO3 has been measured in the 300-723 K temperature range. A sharp ferroelectric phase transition from cubic to tetragonal symmetry, associated with a phonon frequency dip and a Landau-Khalatnikov-like damping maximum, has been observed near 528 K. Evidence for a relaxation mode in the form of a broad Rayleigh wing, whose frequency is strongly temperature dependent above 528 K, is found. The relaxation time and frequency are evaluated based on the tunneling model and a modified-superparaelectric model, respectively.

KW - A. Ferroelectrics

KW - D. Phase transitions

KW - E. Inelastic light scattering

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