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Título

The low temperature magnetostructural transition in Pr0.50Sr0.50CoO3: Bulk versus thin film behavior

AutorPadilla-Pantoja, Jessica CSIC ORCID; Herrero Martín, Javier CSIC ORCID; Torrelles, Xavier CSIC ORCID; Bozzo, Bernat CSIC ORCID; Blasco, Javier CSIC ORCID; Ritter, C.; García Muñoz, Josep Lluís CSIC ORCID
Fecha de publicación2014
EditorAmerican Institute of Physics
CitaciónJournal of Applied Physics 115(17): 17D721 (2014)
ResumenWe present a comparative study of the magnetic transitions in metallic Pr0.50Sr0.50CoO3 (PSCO) perovskites prepared in polycrystalline and thin film forms. As the bulk system, the strained epitaxial PSCO (010) film grown on LAO (100) is metallic in all the temperature range, with a ferromagnetic transition at 225 K, close to Tc ∼ 235 K in the ceramic PSCO specimen. Unlike the bulk system, the PSCO film does not show the second magnetic transition on cooling. In the ceramic sample, the second magnetic transition is coupled to an orthorhombic-to-monoclinic symmetry change. There is a contraction of the average ⟨Pr-O⟩ bond distance in the monoclinic phase below Ta, but the ⟨Co-O⟩ bond length is not modified across the transition. The orthorhombic to monoclinic structural transition stabilizes four short Pr-O2 bonds to basal oxygens in CoO6 octahedra. A strong hybridization of Pr 4f and O 2p orbitals in these bonds can be activated at Ta and probably assist the magnetostructural transition.
DescripciónUnder the terms of the license Creative Commons Attribution 3.0 Unported License to their work.
Versión del editorhttp://dx.doi.org/10.1063/1.4865465
URIhttp://hdl.handle.net/10261/121170
DOI10.1063/1.4865465
ISSN0021-8979
E-ISSN1089-7550
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