Such careful control of temperature can be avoided in a specialized form of MFH called self-regulated MFH, where MNPs that have a Curie temperature (Tc) equal to the therapeutic temperature are employed. When heated by the application of an alternating magnetic field, these MNPs heat up to their Tc. Beyond their Tc, they loose magnetism and can no longer heat even in the presence of the magnetic field, thus self-regulating the temperature. Bulk Fe72Pt28 in the disordered state has a Tc of ~45°C.
In the present work, we report on the synthesis of 4nm and 6nm FexPt100-x nanoparticles for self-regulated MFH. The compositions of the particles were tuned to be around Fe72Pt28. Magnetic measurements of these nanoparticles were performed to determine their suitability for self-regulated MFH.