Patent ID: 7180773

Claim:
A magnetic memory device comprising: first and second write wires that intersect each other in a non-contact manner; and a magnetic tunnel junction element which is arranged in an intersection of said first and second write wires and includes a magnetic tunnel junction, wherein said magnetic tunnel junction element has a free layer consisting of a ferromagnetic material in which a magnetization direction is variable with a magnetic field generated by current flowing through said first and second write wires, and in the case where a distance between a center of said first write wire in a thickness direction and a center of said free layer in the thickness direction is represented as L 1 , a distance between a center of said second write wire in the thickness direction and a center of said free layer in the thickness direction is represented as L 2 , a cross-sectional area of said first write wire in a width direction is represented as S 2 and a cross-sectional area of said second write wire in a width direction is referred to as S 1 , said distance L 1 , said distance L 2 , said cross-sectional area S 1 , and said cross-sectional area S 2 are set in such a manner that when a ratio of said distance L 1 to said distance L 2 is L 1 /L 2 ≧1, a relation of (⅓)·(L 1 /L 2 )≦S 2 /S 1 ≦1 is satisfied and when the ratio of said distance L 1 to said distance L 2 is L 1 /L 2 ≦1, a relation of 1≦S 2 /S 1 ≦3(L 1 /L 2 ) is satisfied.