# Thermal Control of the Magnon-Photon Coupling in a Notch Filter coupled to a Yttrium-Iron-Garnet/Platinum System

## TL;DR

This study demonstrates thermal tuning of magnon-photon coupling in a YIG/Pt system integrated with a notch filter, enabling controllable microwave filtering at room temperature through current-induced heating.

## Contribution

It introduces a method for thermally controlling mode hybridization in a YIG/Pt system coupled with a notch filter, advancing tunable microwave device technology.

## Key findings

- Thermal control modifies the transmission spectra.
- Magnon-photon coupling strength can be tuned at room temperature.
- Potential for tunable microwave filtering applications.

## Abstract

We report thermal control of mode hybridization between the ferromagnetic resonance (FMR) and a planar resonator (notch filter) working at 4.74 GHz. The chosen magnetic material is a ferrimagnetic insulator (Yttrium Iron Garnet: YIG) covered by 6 nm of platinum (Pt). A current induced heating method has been used in order to enhance the temperature of the YIG/Pt system. The device permits us to control the transmission spectra and the magnon-photon coupling strength at room temperature. These experimental findings reveal potentially applicable tunable microwave filtering function.