Patent ID: 7692229

Claim:
A magnetic memory, comprising: a wire for producing a writing field, a magneto-resistivity effect element disposed on said wire, a ferromagnetic yoke disposed on four sides of said wire as to at least partially cover said wire in a longitudinal direction of said wire with said magneto-resistivity effect element, and an antiferromagnetic layer added to said ferromagnetic yoke and adapted to establish substantial coincidence between the pinning direction of the state of magnetization of said ferromagnetic yoke and the direction of extension of said wire, and wherein said ferromagnetic yoke is composed of an element side yoke disposed on a side of said magneto-resistivity effect element across a gap from said wire, a counter-element side yoke disposed on the side opposite said magneto-resistivity effect element on said wire across a gap from said wire, and a pair of lateral part yokes looping said ferromagnetic yoke by connecting opposite terminals of said element side yoke and opposite terminals of said counter-element side yoke and disposed across a gap from said wire, said gap is occupied by an insulator, said wire and said ferromagnetic yoke are set in a mutually insulated state by said insulator, and said wire is passed toward inner peripheral sides of said pair of lateral part yokes and said antiferromagnetic layer is added to at least part of inner peripheral sides of said element side yoke of said ferromagnetic yoke.