Patent ID: 7466583

Claim:
An MRAM cell having a free layer formed in two magnetized parts, a first free layer part from which stored information is read and a second free layer part on which said information is written and stored comprising: a first cell portion for reading stored information including a pinned layer, a tunneling barrier layer and said first free layer part, said first cell portion having a resistance value depending on the relative orientations of the magnetization of said first free layer part and the magnetization of said pinned layer; and said first free layer part having very little or no magnetic anisotropy or having magnetic anisotropy wherein an easy magnetic axis of said first free layer part is directed perpendicularly to an easy magnetic axis of said second free layer part; and a second cell portion including said second free layer part, in which said second cell portion information can be written and stored in accord with the magnetization direction of said second free layer part and said second free layer part having a magnetic anisotropy to maintain said magnetization direction in the absence of an external magnetic field; and wherein the horizontal dimensions of said first and second free layer parts and a spacing formed therebetween permits the formation of a magnetostatic interaction between said first and second free layer parts, whereby the magnetization of said second free layer part orients a magnetization of said first free layer part in an opposite direction thereto.