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High-pressure Raman study of CaV2O5

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dc.contributor.author Popovic, ZV en
dc.contributor.author Stergiou, V en
dc.contributor.author Raptis, YS en
dc.contributor.author Konstantinovic, MJ en
dc.contributor.author Isobe, M en
dc.contributor.author Ueda, Y en
dc.contributor.author Moshchalkov, VV en
dc.date.accessioned 2014-03-01T11:44:30Z
dc.date.available 2014-03-01T11:44:30Z
dc.date.issued 2002 en
dc.identifier.issn 0953-8984 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/36987
dc.subject High Pressure en
dc.subject.classification Physics, Condensed Matter en
dc.subject.other Atoms en
dc.subject.other Calcium en
dc.subject.other Crystal structure en
dc.subject.other Electronic properties en
dc.subject.other High pressure effects en
dc.subject.other Molecular vibrations en
dc.subject.other Phase transitions en
dc.subject.other Phonons en
dc.subject.other Quantum theory en
dc.subject.other Raman spectroscopy en
dc.subject.other Calcium vanadium oxide en
dc.subject.other Disordered phase en
dc.subject.other High pressure Raman spectroscopy en
dc.subject.other Layered structure en
dc.subject.other Orthorhombic structure en
dc.subject.other Structural change en
dc.subject.other Calcium compounds en
dc.title High-pressure Raman study of CaV2O5 en
heal.type other en
heal.identifier.primary 10.1088/0953-8984/14/32/101 en
heal.identifier.secondary http://dx.doi.org/10.1088/0953-8984/14/32/101 en
heal.language English en
heal.publicationDate 2002 en
heal.abstract The phonon dynamics of the spin ladder calcium vanadium oxide is studied using Raman spectroscopy under high pressure up to 13.5 GPa. Twelve Raman modes, which are observed and assigned at low pressures, disappear at around 9 GPa. With further pressure increase, three broad modes appear at about 325, 750 and 810 cm(-1), indicating the transition of the layered structure into the disordered phase. No scattering activity is found above 13 GPa. The comparison between the vibrational properties of CaV2O5, alpha'-NaV2O5 and V2O5 indicates that anomalous 448 cm(-1) mode hardening in alpha'-NaV2O5 under pressure is also due to structural changes. The intercalation of Ca atoms results in a higher compressibility and stability of the CaV2O5 crystal structure in comparison with V2O5. en
heal.publisher IOP PUBLISHING LTD en
heal.journalName Journal of Physics Condensed Matter en
dc.identifier.doi 10.1088/0953-8984/14/32/101 en
dc.identifier.isi ISI:000177800100001 en
dc.identifier.volume 14 en
dc.identifier.issue 32 en
dc.identifier.spage L583 en
dc.identifier.epage L589 en


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