Patent ID: 8063709
Filing Date: 2011-11-22
Classification: B82Y,H01F,H03B

Abstract:
1. A method of operating a spin-transfer torque structure to generate voltage oscillations, said structure comprising: a first layer of magnetic material having a fixed magnetization vector, a spacer of non magnetic material, and a second layer of magnetic material having a free magnetization vector, said method including the application of a current through said structure and characterized by the steps of: setting the operating point of the spin-transfer torque structure in a region of bistability in which the magnetization vector of the second layer remains in a stable static state when the region of bistability is entered from a static state and remains in a stable precessing state when the region of bistability is entered from a state of precessing; increasing the current in absolute values above a first threshold value, thereby inducing a precession of the magnetization vector of the second layer; and decreasing the current in absolute values below said first threshold value, the magnetizing vector of the second layer being thereby kept in said precessing state.