Local tetragonal distortion in La_{0.7}Sr_{0.3}MnO_3 strained thin films probed by x-ray absorption spectroscopy

Simple item page
dc.creatorSouza-Neto, Narcizo M.
dc.creatorRamos, Aline Y.
dc.creatorTolentino, Hélio C. N.
dc.creatorFavre-Nicolin, Emmanuel
dc.creatorRanno, Laurent
dc.date2004-08-12
dc.date2004-12-11
dc.date.accessioned2026-07-07T02:59:43Z
dc.date.available2026-07-07T02:59:43Z
dc.descriptionWe report on an angular resolved X-ray Absorption Spectroscopy study of $La_{0.7}Sr_{0.3}MnO_{3}$ thin films epitaxially grown by pulsed laser deposition on slightly mismatched substrates which induce tensile or compressive strains. XANES spectra give evidence of tetragonal distortion within the $MnO_{6}$ octahedra, with opposite directions for tensile and compressive strains. Quantitative analysis has been done and a model of tetragonal distortion reflecting the strain has been established. EXAFS data collected in plane for tensile substrate confirm the change in the $Mn-O$ average bond distance and the increase of $Mn-Mn$ length matching with the enlargement of the cell parameter. From these results we conclude that there is no significant change in the $Mn-O-Mn$ angle. Our observations conflict with the scenarios which this angle is the main driving parameter in the sensitivity of manganite films properties to external strains and suggest that the distortion within the octahedra plays a key role in the modification of the transport and magnetic properties.
dc.description8 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0408279
dc.identifierhttp://arxiv.org/abs/cond-mat/0408279
dc.identifierPhysical Review B 70, 174451 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.174451
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24620
dc.subjectMaterials Science
dc.titleLocal tetragonal distortion in La_{0.7}Sr_{0.3}MnO_3 strained thin films probed by x-ray absorption spectroscopy
dc.typetext

Files

Collections

arXiv