Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834179 | Journal of Magnetism and Magnetic Materials | 2005 | 4 Pages |
Abstract
Oxide compounds, Mg0.5Cu0.5Fe2âxMxO4, in which M=La, Ga, Y and x=0 and 0.2, were prepared by self-combustion method and studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electric measurements. The XRD analysis evidenced that the compounds containing Y3+ and La3+ ions are pluriphasic, whereas the others are monophasic. An increase in average grain size and a decrease in the porosity in the Y- and La-substituted compounds were observed from SEM images. The electrical resistivity decreased by La and Y incorporation and increased by Ga incorporation. Concerning the humidity sensitivity of the electrical resistivity, the porous Ga-containing ferrite is the most sensitive to humidity change. For this ferrite the resistivity response time to humidity change is shorter.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
E. Rezlescu, N. Rezlescu, P.D. Popa,