Patent ID: 8878317

Claim:
A magnetoresistive element comprising: a first ferromagnetic layer having an axis of easy magnetization in a direction perpendicular to a film plane, a magnetization direction of the first ferromagnetic layer being changeable; a second ferromagnetic layer having an axis of easy magnetization in a direction perpendicular to the film plane, a magnetization direction of the second ferromagnetic layer being fixed; a first nonmagnetic layer formed between the first ferromagnetic layer and the second ferromagnetic layer; and a third ferromagnetic layer formed on an opposite side from the first nonmagnetic layer relative to the first ferromagnetic layer, and including a plurality of ferromagnetic oscillators generating rotating magnetic fields of different oscillation frequencies from one another, each of the oscillators having a magnetization parallel to the film plane, spin-polarized electrons being injected into the first ferromagnetic layer and inducing precession movements in the plurality of ferromagnetic oscillators of the third ferromagnetic layer by flowing a current between the second ferromagnetic layer and the third ferromagnetic layer, the rotating magnetic fields being generated by the precession movements and being applied to the first ferromagnetic layer, and at least one of the rotating magnetic fields assisting a magnetization switching in the first ferromagnetic layer.