0133758 - FZU-D 20020139 RIV DE eng J - Journal Article
Kamba, Stanislav - Buixaderas, Elena - Ostapchuk, Tetyana - Petzelt, Jan
Ferroelectric soft modes and dynamic central modes near some phase transitions.
Ferroelectrics. Roč. 268, - (2002), s. 163-168. ISSN 0015-0193. E-ISSN 1563-5112
R&D Projects: GA ČR GA202/01/0612
Institutional research plan: CEZ:AV0Z1010914
Keywords : lattice dynamics * phonons * infrared and microwave spectra
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.408, year: 2002

The review of the critical dynamics near ferroelectrics and antiferroelectric phase transitions in Cd₂Nb₂O₇, LiNaGe₄O₉ and PbZrO₃ is presented. It is shown that in all cases of displacive phase transitions the polar soft mode is coupled with another overdamped excitation of a central-mode type.
Permanent Link: http://hdl.handle.net/11104/0031717