Phase separation region in the phase diagram of polycrystalline Pr0.65Ca0.35-xSrxMnO3

D. Niebieskikwiat, R. D. Sánchez, A. Caneiro

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20 Citas (Scopus)


We have performed measurements of thermoelectric power, electrical resistivity and DC magnetization in polycrystalline samples of Pr0.65Ca0.35-xSrxMnO3 with x = 0, 0.02, 0.05, 0.10 and 0.20. The system presents an evolution from a charge-ordered manganite at x = 0, with an insulating-like resistivity and low magnetization values, towards a ferromagnetic (FM) metallic state for x = 0.20. We show that in the intermediate region a strong competition between the FM double-exchange and the localized charge-ordering occurs, inducing the phase segregation of the two competing states in a wide temperature range. We estimate the temperature (T) evolution of the FM phase fraction of the x = 0.10 sample and construct a complete T-x phase diagram.

Idioma originalInglés
Páginas (desde-hasta)241-249
Número de páginas9
PublicaciónJournal of Magnetism and Magnetic Materials
EstadoPublicada - dic. 2001
Publicado de forma externa


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