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Role of Pr cations and the low temperature transition in Pr0.50Sr0.50CoO3: A comparison to Pr0.50Ca0.50CoO3

AutorPadilla-Pantoja, J.; Barón-González, A. J.; Bozzo, B.; Blasco, Javier; Ritter, C.; Herrero Martín, Javier ; García Muñoz, Josep Lluís
Fecha de publicación2014
EditorElsevier
CitaciónPhysica B: Condensed Matter 455: 56-59 (2014)
ResumenThe low temperature properties of Pr0.50Sr0.50CoO3 are studied in comparison to Pr0.50Ca0.50CoO3, which is known to exhibit a Pr3+/Pr4+ valence shift below TMI∼80 K. The evolution of the Pr-O network strongly differs in the Sr and Ca compounds, but both have in common a prominent and sudden contraction of some Pr-O bonds. The structural phase transition that accompanies the so-called magnetocrystalline anisotropy transition at TS∼120 K in Pr0.50Sr0.50CoO3 brings about a notable contraction of some Pr-O2 bonds. The observations give support to the active participation of Pr-4f electrons at the intriguing magnetostructural transition (TS) in Pr0.50Sr0.50CoO3. In addition, we have confirmed that (in absence of praseodymium) the magnetostructural transition is suppressed in (Nd2/3La1/3)0.50Sr0.50CoO3, a perovskite with the same average cationic size at the A-site than Pr0.50Sr0.50CoO3.
Versión del editorhttp://dx.doi.org/10.1016/j.physb.2014.07.045
URIhttp://hdl.handle.net/10261/120965
DOI10.1016/j.physb.2014.07.045
Identificadoresdoi: 10.1016/j.physb.2014.07.045
issn: 0921-4526
e-issn: 1873-2135
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