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"High-temperature magnetization in Y1-xCaxMnO3"
D. Tobia, J. Vargas, E. Winkler, D. Vega, G. Leyva, G. Polla, M. Tovar and M.T. Causa
Proc. of the "7th Latin American Workshop on Magnetism, Magnetic Materials and their Applications" (LAW3M-05), Reñaca, Chile, December 12-16, 2005. Ed. J. Rössler, M. Molina and E. Vogel
Physica B Condens. Matter. 384(1-2) (2006) 41-43
We have studied the T dependence of the susceptibility, χ(T), in the paramagnetic phase of the distorted perovskite series Y1-xCaxMnO3. We have observed different regimes depending on the level of doping. For x~0 and 1 we found a localized behavior for the eg electrons and a delocalized one for intermediate doping (0.2 < x ≤ 0.8). For the delocalized regime we present a mean-field description for χ(T) that includes the interaction between localized and itinerant eg electrons. We compare our results with the less distorted series La1-xCaxMnO3.
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