Papers by Keyword: Residual Magnetization

Abstract: Nanocrystalline nickel ferrite has been successfully synthesized through carbon-adsorb auto combustion method from Ni and Fe nitrate salts. The powders were characterized by X-raydiffraction(XRD) techniques,scanning electron microscopy(SEM),transmission electron microscopy(TEM) and vibrating sample magnetometry(VSM). XRD indicated that the products were spinel NiFe₂O₄. SEM and TEM indicated that the particles were spherical with particle size in the range 10-80nm. VSM showed that the sample exhibited typical ferromagnetic behavior at room temperature,while the coercivity of the sample was 150.45Oe and the residual magnetization of the sample was 5.1emu/g.The saturation magnetization of the sample(25.3emu/g)was lower than that for the reported bulk particles(55emu/g), and it has the ultrafine nature.

Abstract: In this research, the process of artificial aging of beryllium bronze as diffusioncontrollable process was studied at the temperatures of 250–500 0C, at aging time intervals of 0.17 till 2 hours, in the constant magnetic field and without it by microhardness and residual magnetization methods.