Race track magnetic memory device and its writing method

摘要

PROBLEM TO BE SOLVED: To provide a racetrack magnetic memory device for suppressing a large amount of write current. SOLUTION: The magnetic wire 1 is provided, the magnetic wire 1 includes a plurality of magnetic domains (1a, etc.), a current is passed through the magnetic wire 1 to move a magnetic wall, and the magnetic wire 1 functions as a magnetically moving memory. The track magnetic memory device 100. The racetrack magnetic memory device 100 includes a magnetic tunnel junction (MTJ) element 2 including a fixed layer 22, an insulating layer 23, and a SOT (Spin orbit torque) generation source 3. The easy axis of magnetization of the magnetic thin wire 1 is a specific direction perpendicular to the junction surface between the magnetic thin wire 1 and the SOT generation source 3, and the MTJ element 2 and the SOT generation source 3 are objects to be written in the magnetic domain of the magnetic thin wire 1. It is arranged in the region 14, and while a current is passed through the magnetic tunnel junction element 2 to generate a spin transfer torque, another current is passed through the SOT generation source 3 to generate a spin-orbit torque to perform a writing process. [Selection diagram] Fig. 1