Eigen electric moments of magnetic-dipolar modes in quasi-2D ferrite disk particles

TL;DR

This paper investigates the eigen electric moments arising from magnetic-dipolar modes in quasi-2D ferrite disks, revealing their influence on resonance phenomena in microwave cavities and highlighting the role of vortex structures and chiral edge states.

Contribution

It introduces the concept of eigen electric moments in ferrite disks caused by magnetic-dipolar vortices, demonstrating their impact on cavity resonance behaviors.

Findings

Eigen electric moments are associated with vortex structures in ferrite disks.

Ferrite disks exhibit multi-resonance oscillations influenced by cavity electric fields.

Resonance absorption and repulsion phenomena depend on cavity parameters.

Abstract

A property associated with a vortex structure becomes evident from an analysis of confinement phenomena of magnetic oscillations in a quasi-2D ferrite disk with a dominating role of magnetic-dipolar (non-exchange-interaction) spectra. The vortices are guaranteed by the chiral edge states of magnetic-dipolar modes which result in appearance of eigen electric moments oriented normally to the disk plane. Due to the eigen-electric-moment properties, a ferrite disk placed in a microwave cavity is strongly affected by the cavity RF electric field with a clear evidence for multi-resonance oscillations. For different cavity parameters, one may observe the "resonance absorption" and "resonance repulsion" behaviors.