A Brillouin scattering study of the acoustic anomalies in barium-doped lead germanate

Please use this identifier to cite or link to this item: https://doi.org/10.1088/0022-3719/21/30/016

Title:	A Brillouin scattering study of the acoustic anomalies in barium-doped lead germanate
Authors:	Hosea, T.J.C. Ng, S.C.
Issue Date:	30-Oct-1988
Citation:	Hosea, T.J.C., Ng, S.C. (1988-10-30). A Brillouin scattering study of the acoustic anomalies in barium-doped lead germanate. Journal of Physics C: Solid State Physics 21 (30) : 53175328-. ScholarBank@NUS Repository. https://doi.org/10.1088/0022-3719/21/30/016
Abstract:	The effects of piezoelectric coupling between the acoustic and soft optic modes in 2% barium-doped lead germanate are studied using Brillouin light-scattering techniques over a wide range of temperatures from about 120 to 480 K, including the ferroelectric phase transition near 426 K. Anomalies in the velocity and absorption of longitudinal acoustic waves are observed near the phase transformation temperature. The results are used to deduce the linewidth of the overdamped soft-optic-mode response and the piezoelectric coefficient a31. Comparisons are made with results from pure lead germanate. © 1988 IOP Publishing Ltd.
Source Title:	Journal of Physics C: Solid State Physics
URI:	http://scholarbank.nus.edu.sg/handle/10635/95602
ISSN:	00223719
DOI:	10.1088/0022-3719/21/30/016
Appears in Collections:	Staff Publications

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