Specific absorption rate of randomly oriented magnetic nanoparticles in a static magnetic field

• Ruslan A. Rytov and
• Nikolai A. Usov

Beilstein J. Nanotechnol. 2023, 14, 485–493, doi:10.3762/bjnano.14.39

• of the field-free point is obtained for assemblies with different nanoparticle size distributions. The results obtained seem to be helpful for the development of a promising joint application of magnetic nanoparticle imaging and magnetic hyperthermia. Keywords: dynamic hysteresis loop; magnetic

• combined action of ac and dc magnetic fields is studied using a numerical simulation based on the solution of the stochastic Landau–Lifshitz equation [17][20][22][23][26]. The SAR of a randomly oriented assembly is calculated in terms of the area of the dynamic hysteresis loop according to the well-known

• the SAR of the assembly. Figure 1b shows the change in the shape of the dynamic hysteresis loop with increasing Hdc for a particular case of a randomly oriented assembly of nanoparticles with D = 20 nm. It can be seen that the hysteresis loop is strongly deformed as a function of Hdc. For positive