(color online) (a) Optical microscopy of an 8-arm CuMnAs device, and schematic of the electrical pulsing and measurement geometry. (b) Change in the transverse resistance after applying three successive writing pulses of amplitude along the [100] axis (black arrow in panel (a) and black points in panel (b)) and along the [010] axis (red arrow in panel (a) and red points in panel (b)). Adapted from Ref. [3].