Fig. 1: Polarization tunable antiferromagnetic resonance (AFMR) and inverse spin Hall effect (ISHE) measurement in α-Fe₂O₃/Pt heterostructures.

a Magnetic structure of α-Fe₂O₃. Red and blue arrows indicate oppositely polarized sublattice magnetizations. Green circles represent Iron atoms. Oxygen atoms are omitted for clarity. b Device geometry showing spin-to-charge conversion within α-Fe₂O₃ and schematic illustration of microwave polarization. c Room temperature resonant response (blue line) for 120 GHz microwave excitation and resulting ISHE voltage (orange line). d Field frequency mapping of the acoustic and optical resonance modes for both samples extracted from ref. ⁶. Solid (dashed) black lines are theoretical fits to the bulk (thin-film) signals. Error bars are extracted from the FWHM of peak.