S-Space College of Medicine/School of Medicine (의과대학/대학원) Neurosurgery (신경외과학전공) Journal Papers (저널논문_신경외과학전공)
Effects of particle dipole interaction on the ac magnetically induced heating characteristics of ferrite nanoparticles for hyperthermia
- Jeun, Minhong; Bae, Seongtae; Tomitaka, Asahi; Takemura, Yasushi; Paek, Sun Ha; Chung, Kyung-Won; Park, Ki Ho
- Issue Date
- AMER INST PHYSICS
- APPLIED PHYSICS LETTERS; Vol.95 8; 082501
- Magnetic particle dipole interaction was revealed as a crucial physical parameter to be considered in optimizing the ac magnetically induced heating characteristics of magnetic nanoparticles. The ac heating temperature of soft MFe(2)O(4) (M=Mg,Ni) nanoparticles was remarkably increased from 17.6 to 94.7 degrees C (MgFe(2)O(4)) and from 13.1 to 103.1 degrees C (NiFe(2)O(4)) by increasing the particle dipole interaction energy at fixed ac magnetic field of 140 Oe and frequency of 110 kHz. The increase in "magnetic hysteresis loss" that resulted from the particle dipole interaction was the main physical reason for the significant improvement of ac heating characteristics.