Revelation of the Microwave Absorption Properties of Nano-Sized Doubly Substituted Hexagonal Ferrites

The main theme of this work is to synthesize and investigate different properties of Pr³⁺-Cu²⁺ substituted X-type hexaferrite Sr_2-xPr_xCo₂Fe_28-yCu_yO₄₆ with concentration (x = 0, 0.02, 0.06, 0.1 and y = 0, 0.1, 0.3, 0.5) by adopting the sol–gel method. The XRD patterns show the single phase for all the samples. The Pr³⁺-Cu²⁺ substitution in pure X-type hexaferrites changes the structural parameters. The increment in dielectric properties with Pr³⁺-Cu²⁺ substitution is observed and the patterns show anomalous dielectric behavior. The FTIR analysis also confirms the single phase for the prepared materials. The magnetic properties of the material are enhanced with additives. The difference in saturation magnetization, coercivity, and remanence is observed on the basis of allocated cations onto the different lattice sites. The linear increase in saturation magnetization, remanence, and coercivity make them useful as permanent magnets. The thermal analysis is carried out to know the sintering temperature at which the single X-type phase can be attained. The material exhibits the minimum value of reflection loss (microwave absorption) at higher frequencies that make this material useful to act as microwave absorbing material (MAM) for super high frequency (SHF) devices.