Magnetic Characterization and Self-heating of Various Magnetic Nanoparticles for Medical Applications

Abstract- Magnetic and self-heating properties of CoFe2O4, MgFe2O4 and NiFe2O4 nanoparticles were evaluated. MgFe2O4 and NiFe2O4, whose coercive forces are lower than that of CoFe2O4, exhibited higher temperature rise in self-heating excited by ac magnetic field of 150 Oe at 10 kHz. The energy efficiency of magnetic field in generating self heating of these ferrite nanoparticles is also analyzed. It was also evaluated the cytocompatibility of each ferrite nanoparticles. I. BACKGROUND Magnetic nanoparticles exhibit unique properties, such as conjugation of biological materials, guidance by magnet and heat dissipation in alternating magnetic fields. Owing to these properties, magnetic particles can be used for medical applications such as the carrier of drug delivery system and the heat source of hyperthermia [1-3]. The availability o