Fig. 4: Gate-tunable magnetic transitions for the 3L CrSBr device.

a Magneto-PL loops under different gate voltages. Zoomed-in PL intensity from the Mixed states to FM states during the backward (b) and forward (c) sweeps at Vg = ±60 V. The insets show the magnetic structures corresponding to the PL intensity plateaus. Compared to Vg = −60 V, the middle plateau corresponding to the AFM states disappears at Vg = 60 V.