Electronic devices that include (i) a magnetization controlling structure;
(ii) a tunnel barrier structure; and (iii) a magnetization controllable
structure including: a first polarizing layer; and a first stabilizing
layer, wherein the tunnel barrier structure is between the magnetization
controlling structure and the magnetization controlling structure and the
first polarizing layer is between the first stabilizing layer and the
tunnel barrier structure, wherein the electronic device has two stable
overall magnetic configurations, and wherein a first unipolar current
applied to the electronic device will cause the orientation of the
magnetization controlling structure to reverse its orientation and a
second unipolar current applied to the electronic device will cause the
magnetization controllable structure to switch its magnetization in order
to obtain one of the two stable overall magnetic configurations, wherein
the second unipolar current has an amplitude that is less than the first
unipolar current.