The main challenge of the current study is to produce nanocomposites (NCs) of (1-x) CoAl_0.3Fe_1.7O₄ /(x)SmFeO₃ with improved structural and magnetic properties using the citrate auto-combustion technique. High-resolution transmission electron microscopy images showed nanostructures with average particle sizes of 32.5 and 52.5 nm for SmFO₃ and CoAl_0.3Fe_1.7O₄, respectively. The anisotropy constant values for x = 0.3 are nearly 11 times greater than SmFeO₃. The ratio of SmFeO₃ incorporated into NCs adjusts their switching field distribution (SFD), making NCs with a low SFD recommended for recording applications. NCs offer the combined advantages of the two constituent phases and can be used to create new and more advanced applications. Based on the estimated data, the prepared NCs can operate at a frequency between 0.1 and 11.9 GHz, making them suitable for developing nanotechnology devices from radio waves traveling through the S-band to the Ku band.

Graphical abstract