Nickel-zinc spinel nanoferrites: Magnetic characterization and prospects of the use in self-controlled magnetic hyperthermia

Effect of zinc substitution on magnetic properties and AC heating characteristics of Ni1-xZnxFe2O4 (x = 0-1) nanoparticles has been studied. Magnetic parameters, such as saturation magnetization, Curie temperature, specific loss power, have been determined for the samples. It is shown that the samples with a higher zinc concentration (x > 0.5) display reduced values of spontaneous magnetization and Curie temperature as compared to those with x < 0.5. A good agreement between the values of Curie temperature and maximal heating temperature under AC magnetic field is found for the samples with x = 0.75. It is concluded that heavily Zn-substituted Ni1-xZnxFe2O4 nanoparticles are promising materials for self-controlled magnetic hyperthermia applications.