Raman study of the oxygen vibrations in 123-superconductors

Liarokapis, E; Poulakis, N; Palles, D; Conder, K; Kaldis, E; Muller, KA

dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Poulakis, N	en
dc.contributor.author	Palles, D	en
dc.contributor.author	Conder, K	en
dc.contributor.author	Kaldis, E	en
dc.contributor.author	Muller, KA	en
dc.date.accessioned	2014-03-01T01:12:13Z
dc.date.available	2014-03-01T01:12:13Z
dc.date.issued	1996	en
dc.identifier.issn	0921-4526	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12015
dc.subject	Site Selection	en
dc.subject	Superconductors	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Composition effects	en
dc.subject.other	Doping (additives)	en
dc.subject.other	Lattice vibrations	en
dc.subject.other	Oxide superconductors	en
dc.subject.other	Oxygen	en
dc.subject.other	Phonons	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Yttrium compounds	en
dc.subject.other	Oxygen vibrations	en
dc.subject.other	Yttrium barium copper oxide	en
dc.subject.other	High temperature superconductors	en
dc.title	Raman study of the oxygen vibrations in 123-superconductors	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0921-4526(95)00675-3	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0921-4526(95)00675-3	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	A systematic study of the characteristic Raman active phonons due to the vibrations of the oxygen atoms (out-of-phase, in-phase of O2,3 and apex) has been carried out in the YBa2Cu3O6 + x superconductor, with varying and very well defined amount of oxygen and with site selective substitution by 18O. The anharmonic behaviour of the three oxygen modes is examined as a function of the oxygen concentration and compared with previously published work. The association of the new modes which appear at low doping with the oxygen vibrations is delineated by the isotopic substitution. From the evolution of the spectral characteristics with oxygen content, the existence of other phases is investigated. Finally, a novel characteristic which appears in the spectra beyond optimum doping is discussed.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Physica B: Condensed Matter	en
dc.identifier.doi	10.1016/0921-4526(95)00675-3	en
dc.identifier.isi	ISI:A1996UL19600046	en
dc.identifier.volume	219-220	en
dc.identifier.issue	1-4	en
dc.identifier.spage	139	en
dc.identifier.epage	141	en