Title of article
Hypersonic frequency softening and relaxation in relaxor ferroelectric 0.8Pb(Zn1/3Nb2/3)O3–0.2PbTiO3
Author/Authors
Kuok، نويسنده , , M.H and Ng، نويسنده , , S.C. and Fan، نويسنده , , H.J. and Iwata، نويسنده , , M. and Ishibashi، نويسنده , , Y.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2001
Pages
4
From page
169
To page
172
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
Journal title
Solid State Communications
Serial Year
2001
Journal title
Solid State Communications
Record number
1786706
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