Structural and dielectric properties of nanocrystalline Nd3+ substituted nickel–zinc ferrites

• Published in: Journal of materials science. Materials in electronics Vol. 23; no. 3; pp. 697 - 705
• Main Authors: Shinde, T. J., Gadkari, A. B., Vasambekar, P. N.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 2012; Springer
• Subjects: Alternating current; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Dielectric constant; Dielectric loss; Dielectric loss and relaxation; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport in multilayers, nanoscale materials and structures; Exact sciences and technology; Ferrites; Lattice parameters; Materials Science; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Nickel; Optical and Electronic Materials; Permittivity (dielectric function); Physics; Resistivity; Structure of solids and liquids; crystallography; Zinc; Orientational Polarization; Zinc Content; Zinc Ferrite; Ferrite; Dielectric Loss; Cubic lattices; Frequency dependence; Electrical conductivity; Iron oxide; Vegard law; Dielectric properties; XRD; Permeability; Lattice parameters; Zinc; Ferrites; Spinels; Ambient temperature; Electronic component; Dielectric losses; Nickel; Permittivity; Coprecipitation; Nanocrystal
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-011-0474-y

Ferrite samples with general formula Ni 1−x Zn x Nd y Fe 2−y O 4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1; y = 0.01, 0.02 and 0.03) were synthesized by oxalate co-precipitation technique. The X-ray diffraction study confirms the formation of single-phase cubic spinel structure. The lattice constant of the samples increases with increase in zinc content and obeys Vegard’s law. On Nd 3+ substitution lattice constant of the samples slightly increases except zinc ferrite. The frequency dependence of the dielectric constant, dielectric loss and AC conductivity of the samples were determined in the frequency range from 20 Hz to 1 MHz at room temperature. The experimental results reveal that the dielectric constant and dielectric loss decreases where as AC electrical conductivity increases with increase in frequency. The dielectric loss increases with increase in zinc content whereas it decreases with increase in Nd 3+ content. There is no appreciable change in permittivity of the samples with increase in Nd 3+ content. Permeability of all the samples increases with increase in Nd 3+ content. Because of lower dielectric loss, Nd 3+ substituted Ni–Zn ferrites are useful in electronic devices.