La³⁺ Modulated Cu₀.₅Co₀.₅Fe₂₋ₓLaₓO₄ Spinel Ferrites: Structural, Magnetic, and Temperature-Dependent Dielectric Spectroscopy for Microwave Absorption and Dielectric Device Applications. IJIS. 2026;7(2):363-378. doi:10.84761/j047t187