Valence shift of Pr ion from 3+ to 4+ in (Pr1-yYy)0.7Ca0.3CoO3 estimated by X-ray absorption spectroscopy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00379116" target="_blank" >RIV/68378271:_____/12:00379116 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1143/JPSJ.81.064709" target="_blank" >http://dx.doi.org/10.1143/JPSJ.81.064709</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1143/JPSJ.81.064709" target="_blank" >10.1143/JPSJ.81.064709</a>

Result language
angličtina
Original language name
Valence shift of Pr ion from 3+ to 4+ in (Pr1-yYy)0.7Ca0.3CoO3 estimated by X-ray absorption spectroscopy
Original language description
The temperature dependence of the X-ray absorption near-edge structure (XANES) spectra at the Pr L3 edge was measured for the (Pr1-yYy)0.7Ca0.3CoO3 samples (y=0.075 and 0.15), in which a peculiar metal?insulator (MI)transition and a spin-state (SS) transition took place simultaneously at a critical temperature TMI. The valence states of praseodymium ion were determined using the analyses of XANES spectra. The results suggest that the average valence of the praseodymium ion increases below room temperature from the common value 3.0+, undergoes a steepest change at TMI, and reaches finally 3.15+ and 3.27+ at 8K for the y=0.075 and 0.15 samples, respectively.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/GAP204%2F11%2F0713" target="_blank" >GAP204/11/0713: Charge transfer between the transition metal and rare earth ions in perovskites</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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