Patent ID: 8766733

Claim:
An apparatus comprising a radiofrequency oscillator, said radiofrequency oscillator comprising a free layer having a magnetization that precesses when a spin-polarized current passes through said free layer in a direction perpendicular to a plane thereof, an injector for injecting spin-polarized current into said free layer for causing sustained precession of said magnetization, said injector having a spin-polarized current injection face directly in contact with said free layer, a magnetoresistive contact having a measurement face directly in contact with said free layer to form, in combination with said free layer, a tunnel junction for enabling measurement of said precession, a conductive pad, said conductive pad having a conductivity that is greater than a conductivity of said magnetoresistive contact, said conductive pad being directly in contact with said free layer to cause an electrical current flow through said injector that bypasses said magnetoresistive contact, and a current source electrically connected to at least one of said injector and said magnetoresistive contact, said current source being adapted to cause a current flow having a magnitude that is greater than a magnitude of a critical current I c above which said magnetization precesses, wherein said injection face and measurement face comprise opposing parts that are arranged opposite one another on either side of said free layer.