Magnetic nanoparticles present two promising effects: hyperthermia, which has potential in medical treatment approaches, and magneto-optical properties, which are useful in applications such as sensing and theranostics. This study investigates the impact of the heating induced by hyperthermia on the optical and magneto-optical properties of magnetic nanoparticles. A dedicated optical setup allows one to simultaneously induce magnetic hyperthermia with an alternating magnetic field and measure optical properties as well as magneto-induced birefringence and optical absorption. We demonstrate that hyperthermia heating of ${\mathrm{CoFe}}_2{\mathrm{O}}_4$ nanoparticles induces a decrease of their magneto-optical birefringence and an increase of their absorption. These results provide noninvasive monitoring methods for in situ temperature measurement in hyperthermia that would be beneficial for several applications and solid-state measurement.

Close

PrevNext

View figure in article

• Magneto-optical effect
• Thermal properties
• Magnetic nanoparticles
• Finite-element method
• Optical absorption spectroscopy