Patent ID: 8542072
Filing Date: 2013-09-24
Classification: H01L,H03B

Abstract:
1. A radio-frequency oscillator incorporating a magnetoresistive device within which an electron current is able to flow, said device comprising a stack of layers comprising: a magnetic trapped layer, a magnetization of which is of substantially fixed direction; a magnetic free layer; and a non-magnetic intermediate layer interposed between the free layer and the trapped layer; the oscillator also comprising means capable of making an electron current flow in said layers constituting said stack and in a direction perpendicular to a plane which contains said layers, wherein at least the free layer is devoid of any material at a center thereof; and, wherein the means capable of making an electron current flow generates a current flowing through the stack of said layers having a density capable of generating a magnetization in said free layer in a micromagnetic configuration in the shape of a skewed vortex flowing in said free layer around the center of said free layer.