Počet záznamů: 1  

Simultaneous valence shift of Pr and Tb ions at the spin-state transition in (Pr.sub.1-y./sub.Tb.sub.y./sub.).sub.0.7./sub.Ca.sub.0.3./sub.CoO.sub.3./sub..

  1. 1.
    0422574 - FZÚ 2014 RIV US eng J - Článek v odborném periodiku
    Fujishiro, H. - Naito, T. - Takeda, D. - Yoshida, N. - Watanabe, T. - Nitta, K. - Hejtmánek, Jiří - Knížek, Karel - Jirák, Zdeněk
    Simultaneous valence shift of Pr and Tb ions at the spin-state transition in (Pr1-yTby)0.7Ca0.3CoO3.
    Physical Review. B. Roč. 87, č. 15 (2013), "155153-1"-"155153-7". ISSN 1098-0121
    Grant CEP: GA ČR(CZ) GAP204/11/0713
    Institucionální podpora: RVO:68378271
    Klíčová slova: metal-insulator transitions and other electronic transitions * X-ray absorption spectra * spin crossover
    Kód oboru RIV: BE - Teoretická fyzika
    Impakt faktor: 3.664, rok: 2013

    Temperature dependence of the x-ray absorption near-edge structure (XANES) spectra at the Pr L3 and Tb L3 edges was measured for the (Pr1-yTby )0.7Ca0.3CoO3 system, in which a sharp spin-state (SS) transition took place at a critical temperature TSS. A small increase in the valence of the terbium ion was found below TSS, besides the enhancement of the praseodymium valence; the trivalent states, which are stable at room temperature, change to a 3+/4+ ionic mixture at low temperatures. In particular for the y = 0.2 sample, the average valence determined at 8 K amounts to 3.25+ and 3.03+ for the Pr and Tb ion, respectively.
    Trvalý link: http://hdl.handle.net/11104/0228714

     
     
Počet záznamů: 1  

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