Domain wall-motion device

Patent Granted The present invention provides a current injection-type magnetic domain wall-motion device which requires no external magnetic field for reversing the magnetization direction of a ferromagnetic body and which has low power consumption. The current injection-type magnetic domain wall-motion device includes a microjunction structure including two magnetic bodies (a first magnetic body 1 and a second magnetic body 2 ) having magnetization directions antiparallel to each other and a third magnetic body 3 sandwiched therebetween