Dipolar interaction effect on magnetization harmonics in liner chain magnetic nanoparticles

Abstract

Magnetic nanoparticles (MNPs) have been widely studied in many bio applications because of their unique magnetic properties. However, the strong dipolar interaction in MNPs affects their magnetic properties. In this work, to investigate the influence of dipolar interaction on the harmonics of magnetization in MNPs we performed numerical simulations in a liner chain MNPs by stochastic Landau-Lifshitz-Gilbert equation. The simulation results show that the third harmonic component of the magnetization is not uniquely determined by the magnitude of dipole interaction field unlike the fundamental component of the magnetization, it is susceptible to the phase lag between external field and dipole interaction field.