A magnetic tunnel junction (MTJ) sensor in which the free layer longitudinal
biasing
elements are coupled, without insulation, to the free layer outside of the MTJ
stack to provide reliable non-shunting MTJ free layer stabilization without extremely
thin dielectric layers. In one embodiment, hard magnetic (HM) layers are disposed
in contact with the free layer outside of and separated from the MTJ stack active
region by a thick dielectric layer. In another embodiment, antiferromagnetic (AFM)
bias layers are disposed in contact with the free layer outside of and separated
from the MTJ stack active region by a thick dielectric layer. In other embodiments,
nonconductive HM layers are disposed either in contact with the free layer outside
of the MTJ stack active region and/or in abutting contact with the MTJ stack active region.