Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/47554
Share/Impact:
Título : Valence change of praseodymium in Pr0.5Ca0.5CoO3 investigated by x-ray absorption spectroscopy
Autor : Herrero-Martín, Javier, García-Muñoz, J. L., Frontera Beccaria, Carlos, Blasco, Javier, Barón-González, A. J., Subías, G.
Fecha de publicación : Sep-2011
Editor: American Physical Society
Citación : Physical Review B 84(11): 115131 (2011)
Resumen: X-ray absorption spectroscopy measurements in Pr0.5Ca0.5CoO3 were performed at the Pr M4,5, Pr L3, and Ca L2,3 absorption edges as a function of temperature below 300 K. Ca spectra show no changes down to 10 K while a noticeable thermally dependent evolution takes place at the Pr edges across the metal-insulator transition. Spectral changes are analyzed by different methods, including multiple scattering simulations, which provide quantitative details on an electron loss at Pr 4f orbitals. We conclude that in the insulating phase a fraction [15(±5)%] of Pr3+ undergoes a further oxidation to adopt a hybridized configuration composed of an admixture of atomiclike 4f1 states (Pr4+) and f-symmetry states on the O 2p valence band (Pr3+L̲ states) indicative of a strong 4f-2p interaction.
Descripción : 6 páginas, 4 figuras.-- PACS number(s): 71.30.+h, 78.70.Dm, 75.30.Wx, 75.25.Dk.-- et al.
Versión del editor: http://dx.doi.org/10.1103/PhysRevB.84.115131
URI : http://hdl.handle.net/10261/47554
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.84.115131
Appears in Collections:(ICMAB) Artículos
(ICMA) Artículos

Files in This Item:
File Description SizeFormat 
Valence change.pdf516,21 kBAdobe PDFView/Open
Show full item record
 
CSIC SFX LinksSFX Query


Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.