Suppression of the ferromagnetic state in LaCoO3 films by rhombohedral distortion

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dc.creatorFuchs, D.
dc.creatorDieterle, L.
dc.creatorArac, E.
dc.creatorEder, R.
dc.creatorAdelmann, P.
dc.creatorEyert, V.
dc.creatorKopp, T.
dc.creatorSchneider, R.
dc.creatorGerthsen, D.
dc.creatorLoehneysen, H. v.
dc.date2008-12-19
dc.date.accessioned2026-07-07T12:34:06Z
dc.date.available2026-07-07T12:34:06Z
dc.descriptionEpitaxially strained LaCoO3 (LCO) thin films were grown with different film thickness, t, on (001) oriented (LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7 (LSAT) substrates. After initial pseudomorphic growth the films start to relieve their strain partly by the formation of periodic nano-twins with twin planes predominantly along the <100> direction. Nano-twinning occurs already at the initial stage of growth, albeit in a more moderate way. Pseudomorphic grains, on the other hand, still grow up to a thickness of at least several tenths of nanometers. The twinning is attributed to the symmetry lowering of the epitaxially strained pseudo-tetragonal structure towards the relaxed rhombohedral structure of bulk LCO. However, the unit-cell volume of the pseudo-tetragonal structure is found to be nearly constant over a very large range of t. Only films with t > 130 nm show a significant relaxation of the lattice parameters towards values comparable to those of bulk LCO.
dc.description31 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/0812.3892
dc.identifierhttp://arxiv.org/abs/0812.3892
dc.identifierPhys. Rev. B 79, 024424 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.024424
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217306
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleSuppression of the ferromagnetic state in LaCoO3 films by rhombohedral distortion
dc.typetext

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