Sol–gel synthesized Mg–Ag–Mn nanoferrites for Power Applications

Magnesium nanoferrites are gaining a lot of scientific attention because of its magnificent dielectric characteristics such as large dielectric constant with minute dielectric losses, which make it suitable for potential applications such as high frequency, microwave devices, switching devices, power, magnetic storage devices, and many more. A series of manganese- and silver-substituted magnesium nanoferrites with the chemical composition Mg1−yMnyAgxFe2−xO4 (0.1 ≤ y ≤ 0.4, 0.0 ≤ x ≤ 0.3) were synthesized via sol–gel auto-combustion technique for reporting the electrical and dielectric study of synthesized specimens. In the present investigation, the dc resistivity (ρ) of prepared nanoferrites goes on decreasing as a function of Ag+ and Mn2+ concentrations extensively indicate its semi-conductor behavior. From the dielectric measurements, dielectric constant (∈′) increases with the increase in frequency, whereas the dielectric loss tangent (tan δ) shows an inverse behavior with the increasing frequency, respectively. In relation with the dielectric investigations, AC conductivity (σac) shows similar behavior to that of dielectric constant. Therefore, such materials of high dielectric constant with minute dielectric losses make it suitable for the power application.