Patent ID: 8254162

Claim:
A magnetic junction comprising: a free layer having a first magnetic moment switchable between a plurality of stable magnetic states when a write current is passed through the magnetic junction; a symmetry filter that transmits charge carriers having a first symmetry with a higher probability than the charge carriers having a second symmetry; a pinned layer having a second magnetic moment pinned in a particular direction, the symmetry filter residing between the free layer and the pinned layer; a spacer layer; and an additional pinned layer, the spacer residing between the free layer and the additional pinned layer, the additional pinned layer having a third magnetic moment; wherein at least one of the free layer and the pinned layer has the charge carriers of the first symmetry at a Fermi level in a spin channel, lacks the charge carriers of the first symmetry at the Fermi level in an other spin channel, lies substantially in a plane and has a nonzero magnetic moment component substantially perpendicular to the plane, and wherein the additional pinned layer has the charge carriers of the first symmetry in a first additional pinned layer spin channel at an additional pinned layer Fermi level, lacks the charge carriers of the first symmetry at the additional pinned layer Fermi level in a second additional pinned layer spin channel, and wherein a portion of the third magnetic moment is perpendicular to the plane.