Raman studies of vanadates at low temperatures and high pressures

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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

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