Tuning the Magnetic Properties of Hard–Soft SrFe₁₂O₁₉/CoFe₂O₄ Nanostructures via Composition/Interphase Coupling

Magnetic nanocomposites (NCs) are extremely appealing for a wide range of energy-related technological applications, specifically as building blocks next-generation permanent magnets. The design such nanostructures requires precise chemical synthesis methods, which will permit the fine-tuning magnetic properties. Here we present an in-depth structural, morphological and characterization ferrite-based obtained through bottom-up sol–gel approach. combination high coercivity hard phase SrFe12O19 (SFO) saturation magnetization soft phase, CoFe2O4 (CFO), allowed us to develop exchange-coupled bimagnetic NCs. A symbiotic effect is observed in SFO/CFO nanocomposite, unique oriented growth SFO prevents grain CFO, thus restricting crystallite size both. Through X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), measurements clarify relationship between distribution hard/soft particles, optimization interfaces uniform response. This study establish potentiality current magnet technology.