Resumen

HERNANDEZ, N.; HERNANDEZ, T.; DZUL, I.  y  PENA, Y.. Ferromagnetismo en manganitas sustituidas con plata de estructura perovskita. Rev. mex. fis. [online]. 2011, vol.57, n.3, pp. 211-214. ISSN 0035-001X.

A series of mixed oxides of general formula Sm_1-xAg_xMnO₃ 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 ≥ 0.2, samples consist of a ferromagnetic perovskite phase and two nonmagnetic phases, Ag and Ag_1.8Mn₈O₁₆. The ferromagnetic behavior of Sm_1-xAg_xMnO₃ 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-xAg_xMnO₃ by x between 0.1 and 0.5 show that applying 10 T fields these cannot reach a saturation value.

Palabras llave : Perovskite; manganite; solid state reaction; ferromagnetism.