Navegando por Autor "Soares, E. A."
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Artigo Properties of Fe/MgO (100) nanometric films grown by dc sputtering(IOP SCIENCE, 2008-09-26) Gonçalves, Charlie Salvador; Souza, Thatyara Freire de; Bezerra, Claudionor Gomes; Feitosa, Carlos Chesman de Araújo; Soares, E. A.; Paniago, R.; Silva-Pinto, E.; Neves, B. R. A.Structural and magneto-crystalline properties of Fe nanometric films, grown on MgO (1 0 0) using dc magnetron sputtering, were studied by different experimental techniques. Thickness and surface roughness of the films were investigated by atomic force microscopy, while magneto-crystalline properties were investigated by the magneto-optical Kerr effect and ferromagnetic resonance. Furthermore, the purity degree of the films was investigated by x-ray photoelectron spectroscopy. Our results show that as we increase the deposition temperature, the magneto-crystalline anisotropy of the films also increases, as an indication of a better crystallinity of the samples. The saturation value of the magneto-crystalline anisotropy (550 Oe corresponding to bulk Fe) is reached at deposition temperature of 300 ◦C