Micromagnetic simulation of dynamic magnetic susceptibility and magnetostatic interaction fields of conical-shaped barium ferrite nanodot arrays

Abstract

In this paper, the dynamic susceptibility spectra and magnetostatic interaction fields of conical-shaped barium ferrite nanodot arrays were systematically simulated based on the 3D object-oriented micromagnetic framework (OOMMF). This unique structure exhibits multiresonance peaks and the stratified resonance model due to the non-uniform distribution of the demagnetizing field. Furthermore, the calculated the interaction fields of the conical-shaped nanodot arrays illustrate the dependence of the resonance frequency on the distance and size. Consequently, this conical-shaped nanodots array has potential to be applied in microwaveabsorbing materials due to the multi-resonance peaks formation and requires precise control of the size and distance, which determine the resonance frequency.