Phase separation in manganite thin films

Antonakos, A; Lampakis, D; Liarokapis, E; Filippi, M; Prellier, W; Aydogdu, GH; Habermeier, HU

dc.contributor.author	Antonakos, A	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Filippi, M	en
dc.contributor.author	Prellier, W	en
dc.contributor.author	Aydogdu, GH	en
dc.contributor.author	Habermeier, HU	en
dc.date.accessioned	2014-03-01T01:28:59Z
dc.date.available	2014-03-01T01:28:59Z
dc.date.issued	2008	en
dc.identifier.issn	0953-8984	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19069
dc.subject	Phase Separation	en
dc.subject	Thin Film	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	RAMAN-SPECTROSCOPY	en
dc.subject.other	MAGNETIC-FIELD	en
dc.subject.other	STRAIN	en
dc.subject.other	DEPENDENCE	en
dc.subject.other	PHONONS	en
dc.title	Phase separation in manganite thin films	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-8984/20/43/434232	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-8984/20/43/434232	en
heal.identifier.secondary	434232	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Thin films of R1-xCaxMnO3 (R = La, Pr) manganites deposited on different substrates have been studied by micro-Raman spectroscopy. The macroscopic transport and magnetic properties of the films are affected by the structural changes and the strain effects, due to the different R and Ca (0.4 <= x <= 0.6) doping or epitaxial strains. Despite the similar average structure obtained by diffraction techniques, in the Raman spectra the metallic rhombohedral-like R-O(1) bending and Mn-O-Mn or octahedra tilting modes coexist with the broad Jahn-Teller (JT) stretching bands, characteristic of the insulating phase. The intensity of the broad JT bands is related to the amplitude of the cooperative or dynamic octahedron distortions and the charge-ordered phases. Based on a percolation picture, we attribute the spectral modifications to a mesoscopic phase separation.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	JOURNAL OF PHYSICS-CONDENSED MATTER	en
dc.identifier.doi	10.1088/0953-8984/20/43/434232	en
dc.identifier.isi	ISI:000259922600033	en
dc.identifier.volume	20	en
dc.identifier.issue	43	en