Phase formation and lattice strain in superconducting compound Y 1-xLaxBa2Cu3Oy (O≤x≤1)

Gantis, A; Calamiotou, M; Palles, D; Lampakis, D; Liarokapis, E

dc.contributor.author	Gantis, A	en
dc.contributor.author	Calamiotou, M	en
dc.contributor.author	Palles, D	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Liarokapis, E	en
dc.date.accessioned	2014-03-01T01:53:01Z
dc.date.available	2014-03-01T01:53:01Z
dc.date.issued	2003	en
dc.identifier.issn	01631829	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26823
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0141616501&partnerID=40&md5=b18887696c51e02ce2ffffef458d817a	en
dc.subject.other	barium derivative	en
dc.subject.other	copper derivative	en
dc.subject.other	lanthanide	en
dc.subject.other	metal oxide	en
dc.subject.other	perovskite	en
dc.subject.other	yttrium	en
dc.subject.other	article	en
dc.subject.other	ceramics	en
dc.subject.other	conductor	en
dc.subject.other	crystallization	en
dc.subject.other	energy	en
dc.subject.other	powder	en
dc.subject.other	Raman spectrometry	en
dc.subject.other	stoichiometry	en
dc.subject.other	superconductor	en
dc.subject.other	X ray diffraction	en
dc.title	Phase formation and lattice strain in superconducting compound Y 1-xLaxBa2Cu3Oy (O≤x≤1)	en
heal.type	journalArticle	en
heal.identifier.secondary	064502	en
heal.publicationDate	2003	en
heal.abstract	We study the formation and evolution of phases in the La substituted Y 1-xLaxBa2Cu3Oy [(Y-La)123] superconductors from XRD and Raman measurements. We find characteristic modifications in the interatomic distances, bond valence sum (BVS) values and crystallite microstrains, which correlate with corresponding features of the micro-Raman spectra at nominal La compositions x=0.2, 0.5, and 0.8. Based on the Raman spectra we conclude that two phases appear, an intermediate of chemical formula Y1-xLaxBa 2Cu3Oy with x values less than nominal, and another phase of pure La123 with partial substitution of La for Ba and reduced Tc. The crystallographic changes and the reduction of Tc can be interpreted based on the formation of this pure La123 subphase upon La doping.	en
heal.journalName	Physical Review B - Condensed Matter and Materials Physics	en
dc.identifier.volume	68	en
dc.identifier.issue	6	en
dc.identifier.spage	645021	en
dc.identifier.epage	6450211	en