Raman studies of vanadates at low temperatures and high pressures

Siranidi, E; Lampakis, D; Palles, D; Liarokapis, E; Colin, C; Palstra, TTM

dc.contributor.author	Siranidi, E	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Palles, D	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Colin, C	en
dc.contributor.author	Palstra, TTM	en
dc.date.accessioned	2014-03-01T02:46:29Z
dc.date.available	2014-03-01T02:46:29Z
dc.date.issued	2009	en
dc.identifier.issn	1557-1939	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32671
dc.subject	High pressure	en
dc.subject	Orbital ordering	en
dc.subject	Phonons	en
dc.subject	Raman spectroscopy	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Ambient pressures	en
dc.subject.other	High pressure	en
dc.subject.other	Low temperatures	en
dc.subject.other	Micro crystallites	en
dc.subject.other	Orbital ordering	en
dc.subject.other	Orthorhombic phasis	en
dc.subject.other	Polycrystalline compounds	en
dc.subject.other	Raman spectrums	en
dc.subject.other	Raman studies	en
dc.subject.other	Room temperatures	en
dc.subject.other	Scattering configurations	en
dc.subject.other	Structural transitions	en
dc.subject.other	Phonons	en
dc.subject.other	Raman scattering	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Spectrum analysis	en
dc.subject.other	Transition metal compounds	en
dc.subject.other	High pressure liquid chromatography	en
dc.title	Raman studies of vanadates at low temperatures and high pressures	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1007/s10948-008-0401-5	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10948-008-0401-5	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The spin and orbital ordering have been examined for high-quality SmVO3 polycrystalline compound using Raman spectroscopy. Measurements were obtained on individual microcrystallites in the approximate y(zz)y and y(xx)y scattering configurations at low temperatures (down to 20 K) and high pressures (up to 2.75 GPa). At room temperature and ambient pressure only the Ag phonons have been observed in both polarizations examined. The decrease of temperature leads to the appearance of extra peaks in the Raman spectra related to the magnetic and structural transitions that occur in the system. We present evidence of a coexistence of the monoclinic and orthorhombic phases accompanied with the coexistence of the G- and C-type OO phases for temperatures below 100 K. However, no sign of any structural transition has been observed in the high pressure Raman spectra (1.87<P<2.75 GPa) at low temperatures T≥80 K, indicating that SmVO3 remains orthorhombic, at least down to 80 K. © 2008 Springer Science+Business Media, LLC.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Superconductivity and Novel Magnetism	en
dc.identifier.doi	10.1007/s10948-008-0401-5	en
dc.identifier.isi	ISI:000262315900016	en
dc.identifier.volume	22	en
dc.identifier.issue	2	en
dc.identifier.spage	185	en
dc.identifier.epage	188	en