Giant magnetoresistive effect element and current sensor using the same

摘要

Provided is a GMR element having a high resistance change ratio (”R/R min ) and a wide output linearity range, and a current sensor using the same. A GMR element 1 includes a fixed magnetic layer 6 in which magnetization is fixed; a free magnetic layer 8 in which magnetization is changed by an external magnetic field; and a spacer layer 7 which is positioned between the fixed magnetic layer 6 and the free magnetic layer 8, in which the free magnetic layer 8 is formed by laminating a CoFe alloy 8a and a CoFeB alloy 8b. A current sensor uses the GMR element 1.