Raman scattering and X-ray data in the region of ferroelastic phase transition to monoclinic phase in KSc(MoO4)(2)

Authors
Nesterenko, NM Fomin, VI Peschanskii, AV Mitkevich, VV
Citation
Nm. Nesterenko et al., Raman scattering and X-ray data in the region of ferroelastic phase transition to monoclinic phase in KSc(MoO4)(2), FERROELECTR, 239(1-4), 2000, pp. 971-978
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
FERROELECTRICS
ISSN journal
00150193 → ACNP
Volume
239
Issue
1-4
Year of publication
2000
Pages
971 - 978
Database
ISI
SICI code
0015-0193(2000)239:1-4<971:RSAXDI>2.0.ZU;2-P
Abstract
Low-energy lattice modes were investigated above and below the temperature of phase transition from trigonal phase to monoclinic one in KSc(MoO4)(2) b y Raman scattering method. X-ray data and Raman spectra manifest the anomal ies in the temperature region above T similar to 260 K, temperature of phas e transition to monoclinic phase which were not explained in the previous p henomenological model. More complex model is discussed. It was supposed tha t at 237-240K the first-order phase transition between two monoclinic phase s C2/m and C2/c occurs in polydomain samples of KSc(MoO4)(2).