Patent ID: 8637946

Claim:
A vertical spin MOSFET, comprising: a first ferromagnetic layer provided on an upper face of a semiconductor substrate, and having a fixed magnetization; a nonmagnetic semiconductor layer provided on an upper face of the first ferromagnetic layer, including a lower face opposed to the upper face of the first ferromagnetic layer, an upper face opposed to the lower face, and a side face different from the lower face and the upper face, and serving as a channel; a second ferromagnetic layer provided on the upper face of the nonmagnetic semiconductor layer, and having a variable magnetization direction; a first tunnel barrier provided on an upper face of the second ferromagnetic layer; a second tunnel barrier provided between the first ferromagnetic layer and the nonmagnetic semiconductor layer; a third tunnel barrier provided between the second ferromagnetic layer and the nonmagnetic semiconductor layer; a third ferromagnetic layer provided on an upper face of the first tunnel barrier, and having a fixed magnetization direction, the magnetization direction of each of the first to third ferromagnetic layer being in parallel or antiparallel to a direction from the third ferromagnetic layer to the first ferromagnetic layer; a non-magnetic layer provided on the third ferromagnetic layer; a gate insulating film provided on the side face of the nonmagnetic semiconductor layer; and a gate electrode provided on the side face of the nonmagnetic semiconductor layer with the gate insulating film being interposed therebetween.