Soft mode doublet in PbMg.sub.1/3./sub.Nb.sub.2/3./sub.O.sub.3./sub. relaxor investigated with hyper-Raman scattering

0347985 - FZÚ 2011 RIV US eng J - Journal Article
Al-Zein, A. - Hlinka, Jiří - Rouquette, J. - Hehlen, B.
Soft mode doublet in PbMg_1/3Nb_2/3O₃ relaxor investigated with hyper-Raman scattering.
Physical Review Letters. Roč. 105, č. 1 (2010), 017601/1-017601/4. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR GAP204/10/0616
Institutional research plan: CEZ:AV0Z10100520
Keywords : PMN * relaxory * fonon * hyper-Raman scattering
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 7.621, year: 2010
http://link.aps.org/doi/10.1103/PhysRevLett.105.017601

Hyper-Raman scattering experiments suggest that a splitting of the lowest F1u-symmetry mode of PbMg1/3Nb2/3O3 crystal occurs in a wide temperature range around its Burns temperature Td. The lower-frequency component, known below the Burns temperature from far-IR spectroscopy, actually becomes underdamped above the Burns temperature.
Permanent Link: http://hdl.handle.net/11104/0188617