Ferrimagnetic nanoparticles for self-controlled magnetic hyperthermia

Based on the Heisenberg model including single-site uniaxial anisotropy and using a Green’s function technique we studied the influence of size and composition effects on the Curie temperature T C , saturation magnetization M S and coercivity H C of spherical nanoparticles with a structural formula M e 1− x Zn x Fe 2 O 4 , Me = Ni, Cu, Co, Mn. It is shown that for x = 0.4–0.5 and d = 10–20 nm these nanoparticles have a T C = 315 K and are suitable for a self-controlled magnetic hyperthermia.