Ferromagnetismo en manganitas sustituidas con plata de estructura perovskita

N. Hernández, T. Hernández, I. Dzul, Y. Peña


A series of mixed oxides of general formula Sm$_{1 - x}$Ag$_{x}$MnO$_{3}$ with perovskite structure were prepared by first time by conventional solid-state reaction processing. The structure, morphology and magnetism of the samples are investigated. The X-ray diffraction patterns show that the x = 0.1 sample is a single perovskite structure, while x $ \ge $ 0.2, samples consist of a ferromagnetic perovskite phase and two nonmagnetic phases, Ag and Ag$_{1.8}$Mn$_{8}$O$_{16}$. The ferromagnetic behavior of Sm$_{1 - x}$Ag$_{x}$MnO$_{3}$ decrease with increase of Ag composition. The SEM analysis when x = 0.1 revealed that the random distribution of morphology and size of particles result of preparation method. The samples of Sm$_{1 - x}$Ag$_{x}$MnO$_{3}$ by x between 0.1 and 0.5 show that applying 10 T fields these cannot reach a saturation value.


Perovskite; manganite; solid state reaction; ferromagnetism

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Revista Mexicana de Física

ISSN: 2683-2224 (on line), 0035-001X (print)

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