Fig. 5. Switching the handedness of propagating antiferromagnetic magnons.

As shown in the top panel, the excitation microwave frequency $f_{\mathrm{rf}}$ is tuned to either 13.6 GHz or 18.0 GHz, and $\mathrm{\Delta }{V}_{\mathrm{ISHE}}$ is detected in T-T antiparallel magnetization configuration at ${\mu }_0{H}_{\mathrm{ext}}$ = 140 mT (middle panel) and in H-H antiparallel magnetization configuration at ${\mu }_0{H}_{\mathrm{ext}}$ = −140 mT (bottom panel), with the external magnetic field tilted at ${\theta }_H$ = 30°.