# Spin-wave coupling to electromagnetic cavity fields in dysposium ferrite

## TL;DR

This paper demonstrates the coupling of spin-waves with electromagnetic cavity fields in dysprosium ferrite, revealing magnon-photon interactions through transmission measurements and theoretical modeling.

## Contribution

It presents the first experimental observation of spin-wave and electromagnetic cavity field coupling in an antiferromagnet, supported by classical and microscopic models.

## Key findings

- Magnon-photon coupling signatures observed at resonance crossings
- Spectra explained by classical electrodynamics and microscopic theory
- Coupling demonstrated in the 0.2-0.35 THz frequency range

## Abstract

Coupling of spin-waves with electromagnetic cavity field is demonstrated in an antiferromagnet, dysprosium ferrite (DyFeO3). By measuring transmission at 0.2-0.35 THz and sweeping sample temperature, magnon-photon coupling signatures were found at crossings of spin-wave resonances with Fabry-Perot cavity modes formed in samples. The obtained spectra are explained in terms of classical electrodynamics and a microscopic model.