Ferromagnetismo en manganitas sustituidas con plata de estructura perovskita

A series of mixed oxides of general formula Sm1ixAgxMnO3 with perovskite structure were prepared by first time by conventional solidstate 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 Ag1:8Mn8O16. The ferromagnetic behavior of Sm1ixAgxMnO3 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 Sm1ixAgxMnO3 by x between 0.1 and 0.5 show that applying 10 T fields these cannot reach a saturation value.