Patent ID: 9680088
Date: 2017-06-13
CPC Classifications: B82Y,G11C,H01F,H01L

Claim:
1. A ferromagnetic tunnel junction element, comprising: a ferromagnetic free layer; an insulating layer; and a ferromagnetic fixed layer that, together with the ferromagnetic free layer, sandwiches the insulating layer; wherein the ferromagnetic free layer includes a first ferromagnetic layer in contact with the insulating layer, a nonmagnetic metal layer, and a second ferromagnetic layer that, together with the first ferromagnetic layer, sandwiches the nonmagnetic metal layer, and wherein the second ferromagnetic layer has a saturation magnetization smaller than a saturation magnetization of the first ferromagnetic layer; and wherein a film thickness of the nonmagnetic metal layer is set to a film thickness at which the first ferromagnetic layer is ferromagnetically coupled to the second ferromagnetic layer to maintain a parallel state between the first ferromagnetic layer and the second ferromagnetic layer in which a magnetization direction of the first ferromagnetic layer is parallel with and in a same direction as a magnetization direction of the second ferromagnetic layer.