Инд. авторы:	Aleksandrov K.S., Voronov V.N., Vtyurin A.N., Krylov A.S., Molokeev M.S., Pavlovski M.S., Goryanov S.V, Likhacheva A.Y., Ancharov A.I.
Заглавие:	Pressure-induced phase transition in the cubic ScF3 crystal
Библ. ссылка:	Aleksandrov K.S., Voronov V.N., Vtyurin A.N., Krylov A.S., Molokeev M.S., Pavlovski M.S., Goryanov S.V, Likhacheva A.Y., Ancharov A.I. Pressure-induced phase transition in the cubic ScF3 crystal // Physics of The Solid State. - 2009. - Vol.51. - Iss. 4. - P.810-816. - ISSN 1063-7834. - EISSN 1090-6460.
Внешние системы:	DOI: 10.1134/S1063783409040295; SCOPUS: 2-s2.0-65449123951;
Реферат:	eng: Pressure-induced phase transitions in the ScF3 crystal were studied using synchrotron radiation diffraction, polarization microscopy, and Raman spectroscopy. The phase existing in the range 0.6-3.0 GPa is optically anisotropic; its structure is described by space group R 3 c (Z = 2), and the transition is due to rotation of ScF6 octahedra around a threefold axis. The pressure dependence of the structural parameters and angle of rotation are determined. The number of Raman spectral lines corresponds to that expected for this structure; above the phase transition point, a recovery of soft modes takes place. At a pressure of 3.0 GPa, a transition occurs to a new phase, which remains metastable as the pressure decreases. The results are interpreted using an ab initio method based on the Gordon-Kim approach. © 2009 Pleiades Publishing, Ltd.
Издано:	2009
Физ. характеристика:	с.810-816