Effect of Mn2+ doping on structural, magnetic and electrical properties of Ni0.5-xMnxCu0.2Cd0.3Fe2O4 nano ferrites prepared by sol-gel auto combustion method for high-frequency applications

• Published in: Physica. B, Condensed matter Vol. 599; p. 412456
• Main Authors: Hossen, M. Moazzam, Nasrin, S., Hossen, M. Belal
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.12.2020; Elsevier BV
• Subjects: Ac conductivity; Combustion; Dielectric loss; Dielectric loss tangent; Dielectric properties; Electric modulus; Electrical properties; Electrical resistivity; Ferrites; Grain boundaries; Impedance spectroscopy; Infrared spectroscopy; Lattice parameters; Lattice theory; Magnetic properties; Manganese compounds; Sol-gel auto combustion; Sol-gel processes; Spectrum analysis; TEM; Dielectric loss tangent; Sol-gel auto combustion; Impedance spectroscopy; TEM; Electric modulus; Ac conductivity
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2020.412456

The mixed ferrite samples Ni0.5-xMnxCu0.2Cd0.3Fe2O4 (0.0 ≤ x ≤ 0.3, in steps 0.1) have been prepared utilizing the sol-gel auto combustion method. From the XRD peak and FT-IR spectra, the formation of spinel ferrites has been confirmed. From XRD data, both the experimental and hypothetical lattice constant values have been calculated. Surface morphology and particle orientation have been investigated by TEM and FESEM images. The purity and the elemental distribution have determined from EDS spectra. Magnetic parameters have been measured from VSM data. Over an extensive range of frequency (20Hz-15MHz), dielectric properties, electric modulus, impedance spectroscopy, and ac conductivity have been recorded by an impedance analyzer. The minimum dielectric loss has been observed in the high-frequency area. In the impedance spectroscopy graph, grain and grain boundary outcome has been revealed. Typical increasing behavior has been seen from the ac conductivity response of ferrite samples with an enhancement in frequency. •Synthesis of Ni0.5-xMnxCu0.2Cd0.3Fe2O4 via Sol-Gel Auto Combustion method.•Observation of the crystallite size from XRD.•tudy of surface morphology by TEM and FESEM images.•Mn2+ substitution decreased tanδ remarkably.•Increase of ac conductivity with increase of frequency.