Antiferromagnetic resonance in $\alpha$-Fe$_2$O$_3$ up to its N\'eel temperature

TL;DR

This study investigates the temperature-dependent antiferromagnetic resonance in hematite ($ ext{Fe}_2 ext{O}_3$) up to its Ne9el temperature, providing insights into its magnetic properties and estimating the Ne9el temperature at 966 K.

Contribution

It presents the first detailed characterization of antiferromagnetic resonance in hematite across a wide temperature range up to its Ne9el point.

Findings

Ne9el temperature estimated at 966 K

Resonance frequency range identified as 0.19-0.5 THz

Hematite exhibits low spin damping and high Ne9el temperature

Abstract

Hematite ($\alpha$-Fe$_2$O$_3$) is an antiferromagnetic material with a very low spin damping and high N\'eel temperature. The temperature dependence of the antiferromagnetic resonance in a bulk single crystal of hematite was characterized from room temperature up to the N\'eel temperature in the frequency range of 0.19-0.5 THz. From these data, the N\'eel temperature was estimated as 966 K.