A MRAM cell structure is disclosed as containing an additional
ferromagnetic layer and coupling layer between the third ferromagnetic
layer and the anti-ferromagnetic layer. The additional ferromagnetic
layer affects the demagnetization field to which the free layer is
exposed, thereby reducing any bias introduced to the free layer. Further,
by adjusting the thickness of the additional ferromagnetic layer, the
effects of Neel coupling on the free layer are reduced.