Gerald Burns, E.A. Giess, et al.
IEEE JQE
Unlike other ferroelectric perovskites, PbTiO3 displays temperature-dependent Raman spectra consisting of underdamped modes, including the "soft" transverse-optical (TO) modes. Moreover, the softest TO mode shows linewidth divergence at the ferroelectric-to-paraelectric transition. Also in contrast to previously studied perovskites, Raman selection rules are rigorously obeyed in both the ferroelectric and paraelectric states. © 1970 The American Physical Society.
Gerald Burns, E.A. Giess, et al.
IEEE JQE
R. Imbihl, J.E. Demuth, et al.
Physical Review B
J.J. De Yoreo, R.O. Pohl, et al.
Physical Review B
A. Gupta, B.W. Hussey, et al.
Journal of Solid State Chemistry