Raman study of anharmonic effects in Pr0.5Ca 0.5MnO3 thin films

Tatsi, A; Papadopoulou, EL; Lampakis, D; Liarokapis, E; Prellier, W; Mercey, B

dc.contributor.author	Tatsi, A	en
dc.contributor.author	Papadopoulou, EL	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Prellier, W	en
dc.contributor.author	Mercey, B	en
dc.date.accessioned	2014-03-01T01:19:28Z
dc.date.available	2014-03-01T01:19:28Z
dc.date.issued	2003	en
dc.identifier.issn	1098-0121	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15515
dc.subject	Thin Film	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	aluminum oxide	en
dc.subject.other	calcium	en
dc.subject.other	lanthanum	en
dc.subject.other	manganese	en
dc.subject.other	oxygen	en
dc.subject.other	strontium	en
dc.subject.other	titanium	en
dc.subject.other	article	en
dc.subject.other	calculation	en
dc.subject.other	film	en
dc.subject.other	hydrostatic pressure	en
dc.subject.other	low temperature	en
dc.subject.other	mathematical analysis	en
dc.subject.other	measurement	en
dc.subject.other	Raman spectrometry	en
dc.subject.other	temperature	en
dc.title	Raman study of anharmonic effects in Pr0.5Ca 0.5MnO3 thin films	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevB.68.024432	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevB.68.024432	en
heal.identifier.secondary	024432	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	We report low-temperature and hydrostatic pressure Raman measurements in Pr0.5Ca0.5MnO3 thin films grown on SrTiO 3 and LaAlO3 substrates. From the low-temperature dependence of the modes related with the Jahn-Teller distortions of the octahedra, it is found that an increase appears in their relative intensities at temperatures close to the charge-ordering phase transition. Two rotational modes of vibration of the octahedra show an anharmonic behavior. Strains from the substrate do not induce any shift or new modes in the Raman spectra probably due to their relaxation from the interface towards the surface of the films. From the different orientation of the two films, the symmetry of certain modes has been identified.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	Physical Review B - Condensed Matter and Materials Physics	en
dc.identifier.doi	10.1103/PhysRevB.68.024432	en
dc.identifier.isi	ISI:000185229500069	en
dc.identifier.volume	68	en
dc.identifier.issue	2	en
dc.identifier.spage	244321	en
dc.identifier.epage	244328	en