Patent ID: 8115238

Claim:
A memory device comprising: a writing track layer provided with magnetic domains, which each are separated from a neighboring domain by a domain wall; and a stack of an interconnecting layer and a storage track layer, the storage track layer being provided with magnetic domains, each of which are separated from a neighboring domain by a domain wall, wherein the writing track layer and the storage track layer each have a part extending from the interconnecting layer, the part being not in contact with the interconnecting layer the stack of the interconnecting layer and the storage track layer is formed on the writing track layer; wherein the interconnecting layer is formed of a magnetic material which has a lower magnetic anisotropy energy constant than that of the writing track layer and than that of the storage track layer; and wherein the domain wall moves along the writing track layer, the interconnecting layer and/or the storage track layer, by an application of a magnetic field or a current.