Tailoring magnetic and dielectric properties of Co0.9Cu0.1Fe2O4 with substitution of small fractions of Gd3+ ions

• Published in: Journal of materials science. Materials in electronics 2018-04, Vol.29 (7), p.5380-5390
• Main Authors: Naik, Chandan C., Salker, A. V.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt; Coercivity; Copper ferrite; Dielectric properties; Electrical properties; Gadolinium; Magnetic measurement; Magnetic properties; Magnetic saturation; Materials Science; Optical and Electronic Materials; Oxidation; Structural analysis; Substitutes; Thermal analysis; Thermodynamic properties
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-8504-z

This paper describes the structural, magnetic, and dielectric properties of Gd 3+ substituted cobalt–copper ferrite. The influence of Gd 3+ substitution on the structural, magnetic and electrical properties of cobalt–copper ferrite was investigated through various characterization techniques. Thermal analysis was carried out on the prepared gel to know the combustion and calcination temperature. The detailed structural analysis suggests that the substitution of a Fe 3+ ion with a Gd 3+ ion at B site results in lattice distortion, modification in crystallite size and grain size of the material. X-ray photoelectron spectroscopy confirmed the oxidation states of the elements present. Magnetic measurement performed at 300 and 50 K depicts the decrease in saturation magnetization ( Ms ) and increase in coercivity ( Hc ) with Gd 3+ substitution in the cobalt–copper spinel ferrite. The dielectric measurements acquired over a wide range of frequencies and temperature showed an increase in dielectric constant with increasing Gd 3+ concentration.