Structural, optical, electrical and magnetic properties of aluminum substituted Co–Cu–Zn nano-crystalline ferrites

• Published in: Solid state communications Vol. 376; p. 115360
• Main Authors: Trinadh, B., Suresh, J., Patta, G.R., Babu, K. Vijaya, Komali, Ch, Babu, B. Vikram, Devi, K. Anjani, Mohan, B. Sathish, Samatha, K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.12.2023
• Subjects: Coercivity; Crystallite size; Dielectric loss; Loss tangent; Spinel ferrite; Dielectric loss; Crystallite size; Coercivity; Loss tangent; Spinel ferrite
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2023.115360

Strong electrical resistivity, low eddy current and dielectric losses, high saturation magnetization, high permeability, and other significant electrical and magnetic properties of nano-ferrites are only a few. In this investigation a sincere effort has been tried to manufacture Co0.7Cu0.2Zn0.1Fe2-xAlxO4 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.10) nano-ferrites utilizing sol-gel auto-combustion process and systematically characterize the structural, optical, electrical and magnetic features. All the peaks belonging to XRD confirmed a structure of the spinel class and single phase with zero impurities. The intensity ratios are generated for a number of cation combinations occupying tetrahedral and octahedral B site. The higher band (ν1) is identified in between wave numbers 550-600 cm−1 as a result of the vibrations of stretching pertaining to the metal-oxygen tetrahedral band. The grain sizes are measured by the use of image J software associated with the SEM, which are indicated on the images in the range of 3.14 μm–1.215 μm. With a frequency-independent characteristic, the dielectric loss dwindles quickly at low frequencies and slows down at high frequencies. Because of spin non-collinearity at the crystal's surface, the saturation magnetization values climb as particle sizes increase. The coercivity values gradually decline as aluminum concentration rises. [Display omitted] •Nano-crystalline ferrites are successfully synthesized by a facile sol-gel auto-combustion method.•Single phase cubic spinel structure has been obtained and the lattice constant decreases with increasing concentration.•The saturation magnetization was obtained for 61.431 emu/g at x = 0 compound.•The dielectric constant decreases steeply at lower frequencies and remains constant at higher frequencies.