2024-03-29T08:56:51Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1211702021-11-12T13:10:55Zcom_10261_46com_10261_3com_10261_31col_10261_299col_10261_284
2015-08-18T10:33:22Z
urn:hdl:10261/121170
The low temperature magnetostructural transition in Pr0.50Sr0.50CoO3: Bulk versus thin film behavior
Padilla-Pantoja, J.
Herrero Martín, Javier
Torrelles, Xavier
Bozzo, Bernat
Blasco, Javier
Ritter, C.
García Muñoz, Josep Lluís
Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas (España)
Under the terms of the license Creative Commons Attribution 3.0 Unported License to their work.
We 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.
2015-08-18T10:33:22Z
2015-08-18T10:33:22Z
2014
artículo
Journal of Applied Physics 115(17): 17D721 (2014)
0021-8979
http://hdl.handle.net/10261/121170
10.1063/1.4865465
1089-7550
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100003339
eng
Publisher's version
http://dx.doi.org/10.1063/1.4865465
Sí
http://creativecommons.org/licenses/by/3.0/
openAccess
American Institute of Physics