Patent ID: 8779496

Claim:
A spin FET comprising: first and second source/drain areas; a channel area disposed between the first and second source/drain areas; a gate insulation film disposed on the channel area; a gate electrode disposed on the gate insulation film; a first ferromagnetic film disposed on the first source/drain area having a direction of magnetization fixed in an upward direction or a downward direction perpendicular to a film surface; an anti-ferromagnetic ferroelectric film disposed above the second source/drain area and arranged at a side of the gate electrode through a side insulation film; a second ferromagnetic film disposed between the second source/drain area and the anti-ferromagnetic ferroelectric film, and having a direction of magnetization in the upward direction or the downward direction, the direction of magnetization being controlled by a direction of a writing voltage applied between the gate electrode and the anti-ferromagnetic ferroelectric film; and a tunnel barrier film disposed at least one of between the first source/drain area and the first ferromagnetic film and between the second source/drain area and the second ferromagnetic film, wherein a reading voltage is applied to the gate electrode for detecting a reading current between the first and second source/drain areas, and the reading current depends on the direction of magnetization of the second ferromagnetic film.