Patent ID: 6954372

Claim:
A magnetic memory device comprising: a magnetoresistive element; a conductive wire for generating magnetic flux that changes a resistance value of the magnetoresistive element; and at least one ferromagnetic member through which the magnetic flux passes, wherein the at least one ferromagnetic member forms a magnetic gap at a position where the magnetic flux passes through the magnetoresistive element, and the following relationships are established: a) Ml≦2Lg; b) Lw≦5 μm; and c) Ly≦1.0 μm, where Ml is a length of the magnetoresistive element that is measured in a direction parallel to the magnetic gap, Lg is a length of the magnetic gap, Lw is a length of the ferromagnetic member in a direction of drawing of the conductive wire, and Ly is a length of a path traced by the magnetic flux in the ferromagnetic member.