Patent ID: 9112131
Filing Date: 2015-08-18
Classification: B01D,G11C,H01L

Abstract:
1. A vertical spin MOSFET, comprising: a substrate; and a first stacked structure provided above the substrate, the first stacked structure comprising: a first ferromagnetic layer provided above the substrate, and having a fixed magnetization direction; a first tunnel barrier provided on an upper face of the first ferromagnetic layer; a second ferromagnetic layer provided on an upper face of the first tunnel barrier, and having a variable magnetization direction, and serving as one of a source and a drain; a nonmagnetic semiconductor layer provided on an upper face of the second ferromagnetic layer, including a lower face opposed to the upper face of the second 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 third ferromagnetic layer provided on the upper face of the nonmagnetic semiconductor layer, and having a fixed magnetization direction antiparallel to the magnetization direction of the first ferromagnetic layer, and serving as the other of the source and the drain, the magnetization direction of each of the first to third ferromagnetic layers being in parallel to a stacked direction of the stacked structure; 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, wherein the first ferromagnetic layer comprises a second stacked structure that includes a first ferromagnetic sub-layer provided on an upper face of the substrate and having a fixed magnetization direction, a nonmagnetic sub-layer provided on an upper face of the first ferromagnetic sub-layer, and a second ferromagnetic sub-layer having a fixed magnetization direction provided between the nonmagnetic sub-layer and the first tunnel barrier layer, the magnetization direction of each of the first and second ferromagnetic sub-layers being in parallel to a stacked direction of the second stacked structure, the second ferromagnetic sub-layer being antiferromagnetically coupled to the first ferromagnetic sub-layer.