Patent ID: 6927468

Claim:
A magnetic random access memory comprising: a memory cell having a first magnetic layer to record data; a write line including a function which applies a magnetic field to the first magnetic layer; and a second magnetic layer which covers all or part of the write line, wherein the first magnetic layer is exchange-coupled to the second magnetic layer, and a sum of a first magnetic volume Ms 1 ×t 1 of the first magnetic layer and a second magnetic volume Ms 2 ×t 2 of a first portion of the second magnetic layer that is exchange-coupled to the first magnetic layer is smaller than a third magnetic volume Ms′×t′ of a second portion of the second magnetic layer except the first portion (where Ms 1 is saturation magnetization of the first magnetic layer, t 1 is a thickness of the first magnetic layer, Ms 2 is saturation magnetization of the first portion of the second magnetic layer, t 2 is a thickness of the first portion of the second magnetic layer, Ms′ is saturation magnetization of the second portion of the second magnetic layer, and t′ is a thickness of the second portion of the second magnetic layer).