Figure 4 | Scientific Reports

Figure 4

From: Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion

Figure 4The alternative text for this image may have been generated using AI.

Effects of pulsed currents. (a) Pulsed current measurements for fixed current density and two different pulse durations showing current-driven DW speed measurement method. Short pulse duration, 200 ns, wire remains in the same magnetisation configuration. Long pulse duration, 2000 ns, wire magnetisation is fully switched and 180° DW removed. The pulse current density is 1.2 × 1011 Am−2. (b) Current-driven DW mobility curve for AFM coupling obtained by determining the minimum average pulse duration required to fully remove the 180° DW between the measurement contacts for each current density value. The continuous line is a linear regression fit to the data points for values of v e above the threshold where the DWs are set in motion. Results obtained from FM coupled control samples are shown for comparison.

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