Magnetic nanoparticles have great potential as heating elements for use in magnetic hyperthermia for cancer therapy and drug release. A problem with widely used magnetite and mag-hematite nanoparticles is the relatively low magnetization, which results in low heating efficiency. Here high-magnetic-moment Fe70 Co30 nanoparticles with a cubic shape were synthesized using a gas condensation sputtering technique for potential magnetic hyperthermia application. The mean size of nanoparticles was 12 nm with 13.6% standard deviation. Micromagnetic simulation of particles' experimental hysteresis loop suggests that their behavior is dominated by a uniaxial anisotropy.
Bibliographical noteFunding Information:
This work was partially supported by the Medical Device Center of Institute of Engineering in Medicine at University of Minnesota and National Science Foundation Contract No. BME 0730825. Parts of this work were carried out in the Minnesota Characterization Facility which receives partial support from NSF through the NNIN program.