Temperature dependence of the ferromagnetic resonance (FMR) for MnxCo1?xFe2O4 (0 ? x ? 1) nanoparticles

Ferromagnetic resonance was used to study the temperature dependence of mixed manganese-cobalt ferrite nanoparticles with a size range between 5 and 42 nm synthesized by hydrothermal method. Structural characterization carried out using X-ray diffraction, scanning, transmission electron microscopy. M(H) curves as function Mn2+ content at 2.5 300 K, FMR in 80 < T 700 K were for magnetic characterization. Temperature field shows three regions that can be interpreted terms agglomeration, dispersion superparamagnetism samples. The HR $${\Delta H}_{\text{PP}}$$ allows us elucidate key characteristics deviation from ideal superparamagnetic behavior observed measurements open up new research possibilities evaluating interparticle interactions nanoparticles.