Figure 11.

Mechanisms of heat generation in single domain superparamagnetic NPs upon exposure to an alternating magnetic field (AMF). Green circles represent NPs and blue arrows indicate the direction of the magnetic moment. In the case of single-domain MNPs, magnetic relaxation occurs in the form of internal changes in the magnetic moment direction (Néel, dashed black arrows) or physical movement (Brown, solid black arrows) as the particles attempt to align with the applied magnetic field. Adapted from Suriyanto et al. [151].