Spectral, electrical, magnetic and radiation shielding studies of Mg-doped Ni–Cu–Zn nanoferrites

Nanoferrites of Ni 0.1 Cu 0.2 Mg x Zn (0.7− x ) Fe 2 O 4 ( x = 0.0, 0.15, 0.25, 0.35, 0.45, 0.55 and 0.70 wt%) system fabricated using flash auto combustion technique. All investigated samples annealed for 2 h at 600 °C. XRD, FTIR and TEM were utilized to evaluate the structural characterization of as-prepared samples. The electrical DC resistivity of the investigated samples is evaluated as a function of frequency and temperature. The initial magnetic permeability ( μ i ) is dependent on the temperature and was measured at constant frequency 1 kHz and 10 kHz of the sinusoidal wave. A single-phase of spinel structure was formed and with increasing Mg content the peak (311) of 100% intensity decreases, which demonstrates the presence of Mg, which slows down the growth of the crystal as X-ray result. The FTIR spectra of the prepared ferrite samples are distinguished by the presence of two strong absorption bands ( ν 1 = 554 cm −1 ) and ( ν 2 = 449 cm −1 ). The morphological observation is determined by the transmission electron microscopy (TEM) and shows that the particles size ranged between 26 and 39 nm. It can notice shifted Curie temperature ( T c ) to a higher temperature by increasing Mg content. Mass attenuation coefficient ( μ m ), mean free path ( λ ), half value layer ( X 1/2 ), tenth value layer ( X 1/10 ) and effective atomic numbers ( Z eff ) for the studied samples, have been simulated using FLUKA (2020.0beta.2), while energy change from 15 × 10 –3 to 15 3+ keV with increasing Mg concentration, both μm and Zeff decrease. The largest value of μm and Zeff when x = 0% while sample x = 0.35% has a minimum value of λ , X 1/10 and X 1/2 .