Patent ID: 8649214
Filing Date: 2014-02-11
Classification: G11C

Abstract:
1. A magnetic memory comprising: a plurality of magnetic memory elements corresponding to a plurality of magnetic memory cells, each of the plurality of magnetic memory elements including a pinned layer, a free layer, and a nonmagnetic spacer layer residing between the pinned layer and the free layer, each of the plurality of magnetic memory elements being configured such that the free layer is switchable between a plurality of stable magnetic states when a write current is passed through the magnetic memory element of the plurality of magnetic memory elements; and at least one shift register corresponding to the plurality of magnetic memory elements, each of the at least one shift register including a plurality of domains separated by a plurality of domain walls, a domain of the plurality of domains being antiparallel to an adjoining domain, the at least one shift register being configured such that an equilibrium state aligns a portion of the plurality of domains with the plurality of magnetic memory elements, the at least one shift register being configured such that each of the plurality of domain walls is shifted to a location of an adjoining domain wall when a shift current is passed through the at least one shift register in a direction along adjoining domains.