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Temperature driven Pr ‐‐> Co charge migration and Co spin state transition in Pr0.5Ca0.5CoO3 by x-ray spectroscopies

AuthorsHerrero Martín, Javier ; Kvashnina, K.; Gallo, E.; Barón-González, A. J.; García Muñoz, Josep Lluís
Issue Date2012
CitationXXVIII Trobades Científiques de la Mediterrània (2012)
AbstractMetal‐insulator transitions in perovskite cobaltites are a fundamental research topic due to the relevance of the spin state of Co for electron mobility in these strongly correlated oxides. We present a study of the Co spin state changes in Pr0.5Ca0.5CoO3 across the metal‐insulator transition by means of the analysis of two complementary synchrotron x‐ray spectroscopic techniques. Recorded experimental and charge transfer multiplet‐ based calculated Co L2,3 absorption spectra, in combination with Co K main emission lines indicate that Co3+ ions spin state evolves from low in the insulating phase to a low: high mixed state in the metallic regime, close to a 1:1 ratio at ambient temperature.
DescriptionResumen del trabajo presentado a las XXVIII Trobades Científiques de la Mediterrània: "Òxids multifuncionals: de la captació d’energia a la nanoelectrònica" celebradas en Menorca (España) del 24 al 26 de octubre de 2012.
Appears in Collections:(ICMA) Comunicaciones congresos
(ICMAB) Comunicaciones congresos
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