Patent ID: 7697323

Claim:
A magnetic storage device comprising: a line; a yoke made of a magnetic layer covering part of the line; and a magneto-resistive element arranged near the line, and wherein the magneto-resistive element near the line is capable of writing information by using a field occurring from the line, and the device satisfies an equation Iw≦Iwmax, where Iw (mA) is a write current necessary for the line wherein the maximum write current Iwmax (mA) is based on a scaling law that depends on a magneto-resistance R (1/H) of the yoke, where Iwmax (mA)=a·R+b, a mA·H)=7.5E-11, and b (mA)=0.1, and, wherein a gap is formed in part of the yoke in a circumferential direction; and the magneto-resistive element is arranged in or between the gap.