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Low temperature phase transition of Li0.12Na0.88NbO3 studied by Raman scattering

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6 Author(s)
Juang, Y.D. ; Department of Natural Science Education, Tainan Teachers College, Tainan, Taiwan, Republic of China ; Dai, S.B. ; Wang, Y.C. ; Hwang, J.S.
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In this article, we will report the low temperature Raman studies of Li0.12Na0.88NbO3 ceramics at the ferroelectric–ferroelectric phase transitions. The spectral pattern indicates the phase transition occurs at 200 K in the cooling process and at 280 K on heating. The observed spectra are discussed as they relate to the internal stretching modes of the NbO6 octahedron and cation translation modes. The temperature-dependent spectra show that the phase transitions may involve the rearrangement of Na+ cation, the relative orientation of the NbO6 octahedral, and the displacement of Nb ions. © 2000 American Institute of Physics.

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Journal of Applied Physics  (Volume:88 ,  Issue: 2 )