Patent ID: 6376260
Filing Date: 2002-04-23
Classification: B82Y,H01F,H01L

Abstract:
A method of fabricating a magnetic element comprising the steps of:providing a substrate element having a surface; forming a first electrode on the substrate, the first electrode comprising a fixed ferromagnetic layer whose magnetization is fixed in a preferred direction in the presence of an applied magnetic field, the fixed ferromagnetic layer having a top surface, a bottom surface and a thickness t1; forming a spacer layer on the fixed ferromagnetic layer of the first electrode, the spacer layer having a thickness t3; and forming a second electrode on the spacer layer comprising a free ferromagnetic layer whose magnetization is free to rotate in the presence of an applied magnetic field, the free ferromagnetic layer having a thickness t2; wherein t1 is chosen such that the magnetic fields produced by the topology of the top surface and the bottom surface of the fixed ferromagnetic layer cancel to produce near zero coupling energy between the free ferromagnetic layer and the fixed ferromagnetic layer.