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Title: Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3
Authors: Fan, H.J.
Kuok, M.H. 
Ng, S.C. 
Yasuda, N.
Ohwa, H.
Iwata, M.
Orihara, H.
Ishibashi, Y.
Issue Date: 1-Feb-2002
Citation: Fan, H.J., Kuok, M.H., Ng, S.C., Yasuda, N., Ohwa, H., Iwata, M., Orihara, H., Ishibashi, Y. (2002-02-01). Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3. Journal of Applied Physics 91 (3) : 2262-2266. ScholarBank@NUS Repository.
Abstract: Brillouin scattering has been performed on the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3 (PNN) from 80 to 450 K across its Curie temperature. A diffuse phase transition from the paraelectric to ferroelectric phase, associated with a broad phonon frequency dip and a damping maximum, is observed around 200 K. A relaxation mode in the form of a broad Rayleigh wing, whose frequency is strongly temperature dependent above 190 K, is observed and analyzed based on a modified superparaelectric model. Dielectric studies of PNN have also been carried out at several measurement frequencies. The relation between the measurement frequency and the dielectric maximum temperature was analyzed on a modified Vogel-Fulcher model. © 2002 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
Appears in Collections:Staff Publications

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