Raman scattering anomalies in monocrystalline Na0.5Bi0.5TiO3 and Ba0.14(Na0.5Bi0.5)0.86TiO3

Raman scattering spectra peculiarities observed by isofrequency method in the range of diffuse phase transition in monocrystalline Na 0.5 Bi 0.5 TiO 3 (NBT) and Ba 0.14 (Na 0.5 Bi 05 ) 0.86 TiO 3 (NBTB) are reported. Temperature dependencies of nonelastic light scattering intensity at the fixed freq...

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Veröffentlicht in:	Ferroelectrics 1998-01, Vol.205 (1), p.81-85
Hauptverfasser:	Gavshin, M. G., Pastukhov, V. I.
Format:	Artikel
Sprache:	eng
Schlagworte:	0.5 Condensed matter: structure, mechanical and thermal properties diffuse phase transition Equations of state, phase equilibria, and phase transitions Exact sciences and technology Physics Raman scattering single crystal Na Solid-solid transitions Specific phase transitions TiO
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Zusammenfassung:	Raman scattering spectra peculiarities observed by isofrequency method in the range of diffuse phase transition in monocrystalline Na 0.5 Bi 0.5 TiO 3 (NBT) and Ba 0.14 (Na 0.5 Bi 05 ) 0.86 TiO 3 (NBTB) are reported. Temperature dependencies of nonelastic light scattering intensity at the fixed frequency shifts (isofrequency dependencies) obtained on those compounds demonstrate essentially different behaviour. The isofrequency dependencies registered in NBTB have irregular behaviour and are characterised by the presence of small but distinct peaks. Nature of observed anomalies is discussed.
ISSN:	0015-0193 1563-5112
DOI:	10.1080/00150199808228389