Tunable AC Magnetic Hyperthermia Efficiency of Ni Ferrite Nanoparticles

Nickel ferrite nanoparticles, with sizes lying within the superparamagnetic ferrimagnetic transition region, were synthesized using the solvothermal and the thermal decomposition method. Iron and nickel precursors as well as a variety of surfactants were used at adequate proportions to achieve structural and morphological, and hence magnetic tuning of the nanoparticles. X-ray diffraction and electron microscopy were used to visualize the actual particle size, morphology, and monodispersity aspects and to verify the obtained crystal structure. The magnetic hyperthermia response of nickel ferrite nanoparticles and the corresponding mechanisms of heating losses are studied in an effort to unravel the interconnections between the physical properties of magnetic nanoparticles and the tunable ac magnetic hyperthermia efficiency.