Study of Cu-Zn Spinel Ferrites on Europium Substitution for High-Frequency Applications

The study of europium-substituted Cu-Zn spinel ferrites (Cu 0.6 Zn 0.4 Eu x Fe 2− x O 4 ) is important for high-frequency applications as they can have a substantial effect on the magnetic and electrical residences of these materials. Single-phase nano-structured ferrites with varying amounts of Eu were synthesized using the sol–gel technique. The crystalline characteristics were identified using x-ray diffraction (XRD) testing, which demonstrated a rise in lattice parameters as the Eu concentration increased. The DC (direct current) resistivity measurements showed that the samples exhibit a semiconducting behavior, with a decrease in resistance at elevated temperatures. We found that the measured magnetic properties of magnetic saturation ( M s ), remanence magnetization ( M r ), and coercivity ( H c ) were all impacted by the presence of Eu substitution. The saturation magnetization and remanence magnetization decreased while the coercivity increased, making the Eu-doped Cu-Zn spinel ferrites efficient magnetic semiconductors. The improved magnetic and electrical properties make these materials suitable for high-frequency applications.