Investigation of Magnetic Properties of Co0.2Zn0.8Fe2O4Nanoparticles for Hyperthermia Applications

摘要

Co0.2Zn0.8Fe2O4nanoparticles were prepared by high temperature thermal decomposition method [1]. The crystal structure, measured by x-ray diffraction, was cubic spinel with space group Fd-3m and the lattice constant (ao) of 8.4051 ? from Rietveld refinement analysis. Based on the Scherrer equation, the average diameter of nanoparticles was estimated to be 13.4 nm. The magnetic properties were investigated using a vibrating sample magnetometer and 57Fe M?ssbauer spectroscopy. The values of saturation magnetization and coercivity of COo0.2Zn0.8Fe2O4nanoparticles at room temperature were 86.75 emu/g and 31.66 Oe, respectively. The thermal properties for hyperthermia applications were measured by magneTherm device within physiologically safe ranges of frequency and amplitude. The self-heating temperature was estimated to be 123 and 129 °C at 50 and 112 kHz under 25 mT, respectively.