US Patent 11101800 Interlayer exchange coupling logic cells

An NAND or NOR logic device has multiple layers of ferromagnetic material separated from each other by non-magnetic layers of electrically conductive material of atomic thickness, sufficient to generate anti-magnetic response in a magnetized layer. The anti-magnetic response in a layer below a layer magnetized with a polarity is summed in a region which is coupled to an output, the output generating at least one of a NAND, or NOR logic function on applied input magnetization.