Artículos de revistas
Debye-like Diffusive Central Mode Near The Phase Transition In Ferroelectric Lithium Tantalate
Registro en:
Solid State Communications. , v. 19, n. 6, p. 491 - 494, 1976.
381098
10.1016/0038-1098(76)90049-1
2-s2.0-0011132035
Autor
Penna A.F.
Chaves A.
Porto S.P.S.
Institución
Resumen
We report a clear cut evidence of a temperature dependent diffusive central mode associated with the ferroelectric phase transition of LiTaO3; a detailed linshape analysis shows that this central mode is a Debye-like relaxation. We also show its influence in the dielectric constant through polariton measurements for several temperatures. © 1976. 19 6 491 494 Devonshire, Theory of ferroelectrics (1954) Advances in Physics, 5, p. 85 Cochran, Crystal stability and the theory of ferroelectricity (1960) Advances in Physics, 9, p. 387 Anderson, (1960) Fizika Dielekrikov, p. 290. , G.I. Skanavi, Acad. Nauk. USSR, Moscow Firstein, (1974) PhD Dissertation, , University of Southern California, Los Angeles Didomenico, Jr., Porto, Wemple, Evidence from Raman Scattering for an Overdamped Soft Optic Mode in BaTiO_{3} (1957) Physical Review Letters, 19, p. 855 Johnston, Jr., Kaminov, (1968) Phys. Rev., 168, p. 1045 Penna, (1974) PhD. Dissertation, , University of Southern California, Los Angeles Scalabrin, (1974) PhD. Dissertation, , University of Southern California, Los Angeles Fritz, Reese, Brody, Wilson, Cummins, (1971) Light Scattering in Solids, p. 415. , M. Balkanski, Flammarion, Paris Steigmeier, Harbeke, Wehner, (1971) Light Scattering in Solids, p. 396. , M. Balkanski, Flammarion, Paris Nassau, Levinstein, Loiacono, Abrahams, Reddy, Bernstein, Hamilton, (1966) J. Phys. Chem. Solids, 27, p. 983 Glass, (1968) Phys. Rev., 172, p. 564 To be reported and discussed in detail elsewhereAndrade, Prasad Rao, Katuar, Porto, Analysis of the relationship between temperature dependence of the libration mode and dielectric relaxation in NaNO2 (1973) Solid State Communications, 12, p. 847 Coombs, Cowley, (1973) J. Phys., 6 C, p. 121 Mason, Theory of the Ferroelectric Effect and Clamped Dielectric Constant of Rochelle Salt (1974) Physical Review, 72, p. 854 Andrade, Porto, (1974) Ann. Rev. Mat. Sci. Riste, Samuelsen, Otnes, (1971) Solid State Commun., 9, p. 1455 Shirane, Axe, (1971) Phys. Rev. Lett., 27, p. 1803 Scott, Soft-mode spectroscopy: Experimental studies of structural phase transitions (1974) Reviews of Modern Physics, 47, p. 83 Huang, On the Interaction between the Radiation Field and Ionic Crystals (1951) Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 208, p. 352