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|Title:||Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni 1/3Nb 2/3)O 3|
|Citation:||Fan, H.J., Kuok, M.H., Ng, S.C., Yasuda, N., Ohwa, H., Iwata, M., Orihara, H., Ishibashi, Y. (2002-02-15). Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni 1/3Nb 2/3)O 3. Journal of Applied Physics 91 (4) : 2262-2266. ScholarBank@NUS Repository.|
|Abstract:||Brillouin scattering has been performed on the relaxor ferroelectric Pb(Ni 1/3Nb 2/3)O 3 (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|
|Appears in Collections:||Staff Publications|
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