Navegando por Autor "Souza, A. L. R."
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Artigo Magnetic properties of Ni-doped Mo2C produced by fixed bed reactor(Elsevier, 2020-08-15) Dantas, Suylan Lourdes de Araújo; Souza, A. L. R.; Bohn, Felipe; Moriyama, André Luis Lopes; Souza, Carlson Pereira de; Corrêa, Marcio AssolinMo2C and Ni-doped Mo2C were obtained according to a well-established fixed bad reactor methodology. The structural properties were studied by X-ray diffraction and scanning electron microscopy. All samples showed a hexagonal structure; however, the micrograph characterization showed a strong dependence of the agglomerate formation with the Ni-concentration. Magnetization properties were measured and confirm the insertion of the Ni onto Mo2C. From the results, the Ni-doped Mo2C system seems to be a great candidate for usage as multifunctional material, combining both functionalities, catalytic properties of the Mo2C material, and the ferromagnetic ones of the Ni materialArtigo ZrO2 tape as flexible substrate to artificially nanostructured materials(Elsevier, 2017-06-01) Corrêa, Marcio Assolin; Araújo, M. R.; Acchar, Wilson; Souza, A. L. R.; Melo, Acácio Silveira; Bohn, FelipeWe associate tape casting and magnetron sputtering techniques to engineer flexible nanostructures using ZrO2 green tape as substrate. We systematically investigate the structural, magnetic and electrical properties of NiFe/Cr/NiFe trilayer nanostructures, with variable thickness values of the NiFe and Cr layers, grown onto rigid glass and flexible ZrO2 tape substrates. We verify the mirroring of these properties in the trilayer nanostructures, irrespective on the kind of employed substrate. The fact that the trilayer nanostructures can be reproduced in distinct substrates corresponds to an important advance for their applicability. The results place the ZnO2 green tape as an attractive candidate for application flexible substrate in the development of electrical and magnetic sensor elements with high sensitivity to mechanical stress