Phase formation and lattice strain in superconducting compound Y1-xLaxBa2Cu3Oy (0 <= 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	2014-03-01T01:53:09Z
dc.date.available	2014-03-01T01:53:09Z
dc.date.issued	2003	en
dc.identifier.issn	1098-0121	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26875
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	RARE-EARTH	en
dc.subject.other	STRUCTURAL-PROPERTIES	en
dc.subject.other	INTERNAL-STRESSES	en
dc.subject.other	X-RAY	en
dc.subject.other	DIFFRACTION	en
dc.subject.other	SEPARATION	en
dc.subject.other	PARAMETERS	en
dc.subject.other	R=Y	en
dc.title	Phase formation and lattice strain in superconducting compound Y1-xLaxBa2Cu3Oy (0 <= x <= 1)	en
heal.type	journalArticle	en
heal.identifier.secondary	064502	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	We study the formation and evolution of phases in the La substituted Y1-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-xLaxBa2Cu3Oy with x values less than nominal, and another phase of pure La123 with partial substitution of La for Ba and reduced T-c. The crystallographic changes and the reduction of T-c can be interpreted based on the formation of this pure La123 subphase upon La doping.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	PHYSICAL REVIEW B	en
dc.identifier.isi	ISI:000185240600070	en
dc.identifier.volume	68	en
dc.identifier.issue	6	en