Patent ID: 7245464

Claim:
A magnetic memory comprising: a semiconductor layer; an insulating layer on the semiconductor layer; a first ferromagnetic film provided on the insulating layer, a magnetization orientation of the first ferromagnetic film being pinned substantially in one direction; a first insulating film provided on the first ferromagnetic film; and a first magnetic multi-layered film provided on the first insulating film, the first magnetic multi-layered film including a first ferromagnetic layer, a second ferromagnetic layer and a first anti-ferromagnetic layer interposed between the first and second ferromagnetic layers; wherein a current flows between the first magnetic multi-layered film and the first ferromagnetic film by tunneling through the first insulating film, magnitude of exchange coupling which acts between the first ferromagnetic layer and the first anti-ferromagnetic layer is limited not to exceed 1000 oersted, magnitude of exchange coupling which acts between the second ferromagnetic layer and the first anti-ferromagnetic layer is limited not to exceed 1000 oersted, and magnetization orientation of the entirety of the first magnetic multi-layered film is able to be re-written.