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Erschienen in:
14.06.2017
Enhancement of structural and electrical properties of novelty nanoferrite materials
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 19/2017
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Abstract
Novelty Cu–Cr nanoferrite, with the general formula CuCr0.3R0.03Fe1.67O4 (where R = Sm, Nd, Ce and La), were prepared by standard ceramic method and characterized by X-ray diffraction (XRD) analysis. Field emission scanning electron microscope (FESEM) and Energy dispersive X-ray analysis (EDX) were obtained for all samples. The effect of doping Cu–Cr ferrite with different rare earth (R3+) types on the structural and electrical properties showed that the ionic radius, electronic configuration and ionization potential for different R3+ could explain the results. Introducing R3+ in Cu–Cr ferrite retained parent cubic spinel structure ferrite. All R3+ types induced cation redistribution. At low temperature the ionic radius of R3+ control the conduction, whereas at high temperature the ionization potential have the decisive effect. It was found that La-doped Cu Cr sample had the lowest AC conductivity due to its large ionic radius and high ionization potential promising application in memories and microelectronics.