Fig. 2: Current vector adder.

a Scanning transmission electron microscope (STEM) image of (1-10) lattice plane. The crystallographic direction is indicated. b Optical microscope image of the device for demonstration of vector adder. The CoPt pillar used for logic operation is circled by blue dash line. c Anomalous Hall signal of the CoPt pillar used for logic operation. Schematic of vector adder function. d–f electric manipulation of the magnetic state by sum of current vector. The inset is the schematic illustration of CuPt (111) plane in which the black arrow shows the input current. The sum of current vector is along \({\phi }_{I}=({{\rm{d}}})0\space({{\rm{e}}})-\frac{\pi }{6}\) \(({{\rm{f}}})-\frac{\pi }{3}\) indicated by red dash arrow. g Schematic of magnetization switching with current input \( \vec{{{{\bf{I}}}}_{{{\bf{a}}}}}\) and \(\vec{{{{\bf{I}}}}_{{{\bf{b}}}}}\) under in-plane magnetic field. h switching loops with in-plane magnetic field along different directions. i In-plane magnetic field direction dependence of switching ratio of the perpendicular magnetization of CoPt pillar.