Fig. 1
From: High-speed domain wall racetracks in a magnetic insulator
Device schematics and local switching of TmIG. a Optical image of a Pt Hall bar patterned on TmIG with superposed electric wiring, coordinate system, and magnetization vector m. b Hall resistance Rxy as a function of Hz. The anomalous Hall-like signal arises from the interaction of the spin current generated in the Pt layer with the out-of-plane magnetization component mz of TmIG27,54, leading to a high (low) Rxy for −m (+m). The data are shown after subtraction of a constant sample-dependent offset. c Electrical measurement of current-induced switching of TmIG (tp = 1 ms, Hx = + 20, black dots, and −20 Oe, red dots). Note that, starting from a film saturated in the –m state, higher current densities are required to induce forward switching relative to backward switching. The same behavior is observed for ±Hx, thus ruling out a misalignment of the sample as a possible explanation for this effect. d Wide-field differential MOKE image of a TmIG/Pt device after injection of a current pulse (Jx = 0.94 × 108 A cm−2, tp = 150 ns, Hx = 100 Oe). The film was initially saturated in the –m state by applying a magnetic field Hz = −100 Oe. The bright contrast shows that only the TmIG region underneath the Pt current line has switched to +m. Scale bar, 40 μm
