Beyer Law Group LLP
Magnetic sensor and magnetic balance type current sensor utilizing same
A magnetism sensor comprises a magnetoresistive element, the resistance of which changes due to the application of an induced magnetic field from the current being measured, and a fixed-resistance element. The fixed-resistance element has a self-pinned ferromagnetic fixed layer comprising a first ferromagnetic film and a second ferromagnetic film coupled antiferromagnetically with an antiparallel coupling film interposed therebetween. The antiparallel coupling film is a ruthenium film that exhibits an antiferromagnetic coupling effect with a first peak thickness. The difference between the degrees of magnetization of the first ferromagnetic film and the second ferromagnetic film is effectively zero.
Alps Electric Co., Ltd.
G G B
G01R G01R B82Y
inventional inventional inventional
Yosuke Masamichi
Ide Saito