Abstract

Recently, the ceramics materials have been a field of intense study, due to their advantages and properties. The magnetic properties of spinel ferrites are drastically influenced by the type of cations as well as their distribution in either of the A- and B-sublattice of the material under investigation. The electrical conduction and resistivity are fundamental properties of semiconductors and critical parameters in the development of new materials and devices in the electronics industry. CuAlxFe_2-xO₄ (where x= 0, 0.5, 1.0, 1.5 and 1.99) have been pre-synthesized for 24 hs at 800°C and then synthesized at 1100°C for 8h using the usual ceramic method solid state reaction technique using aluminum, copper and iron oxides. Room temperature saturation magnetization was measured as a function of element copper. Parameters magnetic are measured by hysteresis loop (Magnetization M versus Field B). The samples magnetic properties were characterized by using a vibrating sample magnetometer (VSM). The DC electrical conductivity was obtained from the curve of voltage versus current curried through the specimen. The electrical conductivity, σ(T), was measured by a contact method in accordance with the four-point scheme. The system under investigation, copper ferrite aluminate has been studied by means of X-ray powder diffraction (XRD) patterns analysis at room temperature. The system CuAlxFe_2−xO₄, belong to a large class of compounds having the general formula AB2O₄ and crystallize in the cubic spinel structure, where A and B are divalent and trivalent ions respectively.

Keywords: Copper aluminate ferrite; Magnetic hysteresis; Electrical conductivity