Structural phase transitions in loparite-(Ce): Evidences from Raman light scattering

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Structural phase transitions in loparite-(Ce): Evidences from Raman light scattering. / Popova, E.A.; Yakovenchuk, V.N.; Lushnikov, S.G.; Krivovichev, S.V.

In: Journal of Raman Spectroscopy, No. 1, 2015, p. 161-166.

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Popova, E.A. ; Yakovenchuk, V.N. ; Lushnikov, S.G. ; Krivovichev, S.V. / Structural phase transitions in loparite-(Ce): Evidences from Raman light scattering. In: Journal of Raman Spectroscopy. 2015 ; No. 1. pp. 161-166.

BibTeX

@article{384e7a819ade4f0a98b751433a322b76,

title = "Structural phase transitions in loparite-(Ce): Evidences from Raman light scattering",

abstract = "{\textcopyright} 2014 John Wiley & Sons, Ltd.Raman spectroscopic studies of loparite-(Ce), a mineral of the perovskite family, are presented. Polarized Raman spectra were obtained in the temperature range of 50-300 K. As analysis of the behavior of Ramanmodes showed, the temperature dependences of wavenumber, damping and intensity of the optical modes exhibited anomalies near 220 and 150 K. Softening of the lowwavenumber modes observed in the vicinity of 150 K is interpreted as an evidence of a ferroelectric phase transition. An anisotropic quasielastic light scattering in the low-wavenumber region of the Raman spectra was observed from 300 to 150 K. As the data suggest, loparite-(Ce) has two structural phase transitions, one of which (at 150 K) is a ferroelectric transition of the order-disorder type.",

author = "E.A. Popova and V.N. Yakovenchuk and S.G. Lushnikov and S.V. Krivovichev",

year = "2015",

doi = "10.1002/jrs.4587",

language = "English",

pages = "161--166",

journal = "Journal of Raman Spectroscopy",

issn = "0377-0486",

publisher = "Wiley-Blackwell",

number = "1",

}

RIS

TY - JOUR

T1 - Structural phase transitions in loparite-(Ce): Evidences from Raman light scattering

AU - Popova, E.A.

AU - Yakovenchuk, V.N.

AU - Lushnikov, S.G.

AU - Krivovichev, S.V.

PY - 2015

Y1 - 2015

N2 - © 2014 John Wiley & Sons, Ltd.Raman spectroscopic studies of loparite-(Ce), a mineral of the perovskite family, are presented. Polarized Raman spectra were obtained in the temperature range of 50-300 K. As analysis of the behavior of Ramanmodes showed, the temperature dependences of wavenumber, damping and intensity of the optical modes exhibited anomalies near 220 and 150 K. Softening of the lowwavenumber modes observed in the vicinity of 150 K is interpreted as an evidence of a ferroelectric phase transition. An anisotropic quasielastic light scattering in the low-wavenumber region of the Raman spectra was observed from 300 to 150 K. As the data suggest, loparite-(Ce) has two structural phase transitions, one of which (at 150 K) is a ferroelectric transition of the order-disorder type.

AB - © 2014 John Wiley & Sons, Ltd.Raman spectroscopic studies of loparite-(Ce), a mineral of the perovskite family, are presented. Polarized Raman spectra were obtained in the temperature range of 50-300 K. As analysis of the behavior of Ramanmodes showed, the temperature dependences of wavenumber, damping and intensity of the optical modes exhibited anomalies near 220 and 150 K. Softening of the lowwavenumber modes observed in the vicinity of 150 K is interpreted as an evidence of a ferroelectric phase transition. An anisotropic quasielastic light scattering in the low-wavenumber region of the Raman spectra was observed from 300 to 150 K. As the data suggest, loparite-(Ce) has two structural phase transitions, one of which (at 150 K) is a ferroelectric transition of the order-disorder type.

U2 - 10.1002/jrs.4587

DO - 10.1002/jrs.4587

M3 - Article

SP - 161

EP - 166

JO - Journal of Raman Spectroscopy

JF - Journal of Raman Spectroscopy

SN - 0377-0486

IS - 1

ER -

ID: 4005406