Study the magnetic and dielectric properties of Sn substituted nickel–cobalt ferrite synthesized by auto combustion method

• Published in: Journal of materials science. Materials in electronics Vol. 31; no. 18; pp. 15097 - 15107
• Main Authors: Hossain, Sk S., Praveena, K., Roy, P. K.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2020; Springer Nature B.V
• Subjects: Ambient temperature; Bulk density; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt ferrites; Coercivity; Combustion; Crystallites; Dielectric properties; Diffraction patterns; Grain size; Hysteresis loops; Magnetic domains; Magnetic properties; Magnetic saturation; Materials Science; Nanoparticles; Nickel; Optical and Electronic Materials; Room temperature; Sintering; Stoichiometry; Substitutes; Synthesis; Tin; X ray analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-020-04074-3

Nickel–cobalt ferrites with the stoichiometry of Ni 0.4 Co 0.6– x Sn x Fe 2 O 4 (where, x  = 0, 0.02, 0.04, 0.06, 0.08, and 0.10) have been synthesized by the auto combustion method. The X-ray diffraction (XRD) pattern discloses a single-phase spinel structure, and the crystallite sizes of the nanoparticles are estimated at about 12–28 nm. The diffraction peak shifts towards the lesser angle and the lattice parameter slightly improves with the Sn substitution. The surface morphology and elemental composition are examined by the scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDX), respectively. At room temperature, the bulk density, grain size, and coercivity are increased with the Sn substitution. The hysteresis loops of this sintered specimen display an improved magnetic behavior at ambient temperature. The saturation magnetization increases initially and reaches to the maximum at x  = 0.02 (78.05 emu/g) then decreases with higher Sn substitution. All the sintered species retain in the multi magnetic domain. Prepared samples demonstrate a slight reduction both in dielectric constant ( ε ׳) and loss tangent (tan δ ) with an increment of the Sn substitution. The proposed work is expected to open the possible emersion of the ferrite in the high-frequency applications.