Structural And Magneto Absorption Study of Hard and Soft Ferrite

Abstract

This present study reports structural features and magneto absorption properties of Ba and Ni-Zn ferrite nanoparticles with a composition of BaFe₁₂O₁₉ and NiZnFe₄O₄.The structural properties of the samples were studied using X-ray powder diffraction (XRD), Scanning electron microscopy (SEM). The XRD patterns of samples show crystalline peaks owing to ferrite presence. The SEM image shows the collection of nanoparticles with empty spaces. The magnetic characteristics of nanoparticle samples were examined using a vibrating sample magnetometer (VSM). Broad band magnetic resonance in polycrystalline samples were measured at room temperature and frequency (f=1−18GHz) ranges of microwave magnetic field availing ENA vector network analyzer and a copper strip coil that contains one of the samples mentioned above. With an increase in microwave signal's frequency, so does the increment in critical field value. Plot study of acquired graph indicates that Ferromagnetic resonance (FMR) is responsible for the peculiarities in magneto absorption that have been observed.