Patent ID: 6469926
Filing Date: 2002-10-22
Classification: B82Y,G11B,H01F

Abstract:
A magnetic element comprising:a bottom pinned ferromagnetic layer having a top surface and a bottom surface whose magnetization is fixed in a preferred direction in the presence of an applied magnetic field: a top pinned ferromagnetic layer having a top surface and a bottom surface whose magnetization is pinned in a preferred direction in the presence of an applied magnetic field, the bottom pinned ferromagnetic layer and the top pinned ferromagnetic layer fabricated antiparallel to one another; and a bottom tunnel barrier layer, a free ferromagnetic layer and a top tunnel barrier layer formed between the bottom pinned ferromagnetic layer and the top pinned ferromagnetic layer, wherein the top tunnel barrier layer is normal thereby forming a magnetic tunnel junction having a maximum resistance for anti-parallel aligned magnetic electrodes and a minimum resistance for parallel aligned magnetic electrodes and the bottom tunnel barrier layer is reverse thereby having a magnetic tunnel junction having a maximum resistance for parallel aligned magnetic electrodes and a minimum resistance for anti-parallel magnetic electrodes.