Magneto-electric properties of (1-x)LaFeO3 - (x)MnFe2O4 based hybrid nanocomposites for advanced technological applications

In this research paper, a series of (1-x)LaFeO₃ - (x)MnFe₂O₄ (LFO/MFO) nanocomposites with concentrations (x = 0.1, 0.2, 0.3, 0.4, and 0.5) were synthesized through sol-gel auto combustion method. The x-ray diffraction analysis revealed pure FCC spinel phase and perovskite structure for MFO added in LFO respectively. FTIR analysis showed ʋ₁ and ʋ₂ absorption bands with wavenumbers 500 and 400 cm^-1. The frequency dependent dielectric parameters were investigated across abroad spectrum of AC frequencies, starting from 1 MHz to 3 GHz. Dielectric behaviors were found in well agreement with Maxwell – Wagner model followed by Koop’s theory, and hopping model at high frequency region. The Cole-Cole plot elaborated the conduction phenomenon. The nanocomposites demonstrate a stable and consistent dielectric constant (ε′) and dielectric loss (ε″) at moderate frequencies, making them highly suitable for applications in microwave devices, such as resonators, filters, and antennas where stable dielectric properties are crucial for efficient performance. The magnetic behavior was found at room temperature (RT) by applying magnetic field from -22 to +22 k Oe. Magnetic squareness for all prepared samples found <0.5 reported multi-domain structures that can be utilized in many technological areas like electronics, automotive, telecommunications, and magnetic storage devices.