Patent ID: 8174873

Claim:
A magnetic random access memory of domain wall motion type comprising: a magnetic recording layer being a ferromagnetic layer having perpendicular magnetic anisotropy in which a domain wall moves; and a pair of terminals used for supplying a current to said magnetic recording layer, wherein said magnetic recording layer comprises: a first magnetization region connected to one of said pair of terminals; a second magnetization region connected to the other of said pair of terminals; and a magnetization switching region connecting between said first magnetization region and said second magnetization region and having reversible magnetization, wherein a first pinning site, by which the domain wall is trapped, is formed at a boundary between said first magnetization region and said magnetization switching region, a second pinning site, by which the domain wall is trapped, is formed at a boundary between said second magnetization region and said magnetization switching region, and a third pinning site, by which the domain wall is trapped, is formed within said first magnetization region.