Raman scattering boson peak and differential scanning calorimetry studies of the glass transition in tellurium-zinc oxide glasses

Stavrou, E; Tsiantos, C; Tsopouridou, RD; Kripotou, S; Kontos, AG; Raptis, C; Capoen, B; Bouazaoui, M; Turrell, S; Khatir, S

dc.contributor.author	Stavrou, E	en
dc.contributor.author	Tsiantos, C	en
dc.contributor.author	Tsopouridou, RD	en
dc.contributor.author	Kripotou, S	en
dc.contributor.author	Kontos, AG	en
dc.contributor.author	Raptis, C	en
dc.contributor.author	Capoen, B	en
dc.contributor.author	Bouazaoui, M	en
dc.contributor.author	Turrell, S	en
dc.contributor.author	Khatir, S	en
dc.date.accessioned	2014-03-01T01:34:23Z
dc.date.available	2014-03-01T01:34:23Z
dc.date.issued	2010	en
dc.identifier.issn	0953-8984	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20725
dc.subject	Differential Scanning Calorimetry	en
dc.subject	Glass Transition	en
dc.subject	Raman Scattering	en
dc.subject	Zinc Oxide	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Atomic vibration	en
dc.subject.other	Boson peaks	en
dc.subject.other	DSC measurements	en
dc.subject.other	Dynamical effects	en
dc.subject.other	Glass transition temperature	en
dc.subject.other	High frequency HF	en
dc.subject.other	Highly sensitive	en
dc.subject.other	Low frequency band	en
dc.subject.other	Medium-range order	en
dc.subject.other	Network glass	en
dc.subject.other	Raman bands	en
dc.subject.other	Raman studies	en
dc.subject.other	Tellurite glass	en
dc.subject.other	Temperature dependence	en
dc.subject.other	Variable temperature	en
dc.subject.other	ZnO	en
dc.subject.other	Bosons	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Frequency bands	en
dc.subject.other	Glass	en
dc.subject.other	Raman scattering	en
dc.subject.other	Tellurium	en
dc.subject.other	Tellurium compounds	en
dc.subject.other	Zinc	en
dc.subject.other	Zinc oxide	en
dc.subject.other	Glass transition	en
dc.title	Raman scattering boson peak and differential scanning calorimetry studies of the glass transition in tellurium-zinc oxide glasses	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-8984/22/19/195103	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-8984/22/19/195103	en
heal.identifier.secondary	195103	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Raman scattering and differential scanning calorimetry (DSC) measurements have been carried out on four mixed tellurium-zinc oxide (TeO2)1 - x(ZnO)x (x = 0.1, 0.2, 0.3, 0.4) glasses under variable temperature, with particular attention being given to the respective glass transition region. From the DSC measurements, the glass transition temperature Tg has been determined for each glass, showing a monotonous decrease of Tg with increasing ZnO content. The Raman study is focused on the low-frequency band of the glasses, the so-called boson peak (BP), whose frequency undergoes an abrupt decrease at a temperature Td very close to the respective Tg values obtained by DSC. These results show that the BP is highly sensitive to dynamical effects over the glass transition and provides a means for an equally reliable (to DSC) determination of Tg in tellurite glasses and other network glasses. The discontinuous temperature dependence of the BP frequency at the glass transition, along with the absence of such a behaviour by the high-frequency Raman bands (due to local atomic vibrations), indicates that marked changes of the medium range order (MRO) occur at Tg and confirms the correlation between the BP and the MRO of glasses. © 2010 IOP Publishing Ltd.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Journal of Physics Condensed Matter	en
dc.identifier.doi	10.1088/0953-8984/22/19/195103	en
dc.identifier.isi	ISI:000277033100028	en
dc.identifier.volume	22	en
dc.identifier.issue	19	en