Brinks Hofer Gilson & Lione
Magnetic sensing element with in-stack biasing using ferromagnetic sublayers
In a magnetic sensing element, the magnetization direction of a ferromagnetic layer is pinned by an exchange coupling magnetic field between a second antiferromagnetic layer and the ferromagnetic layer, and the magnetization of a free magnetic layer is oriented in a direction substantially perpendicular to the magnetization of a pinned magnetic layer by an RKKY interaction between the ferromagnetic layer and the free magnetic layer with a nonmagnetic layer therebetween. Consequently, the control of the magnetization direction of the free magnetic layer is adjusted in two stages, i.e., by the magnitude of the exchange coupling magnetic field between the second antiferromagnetic layer and the ferromagnetic layer and by the magnitude of the RKKY interaction between the ferromagnetic layer and the free magnetic layer, thus facilitating fine controls.
Alps Electric Co., Ltd.
G G B B
G01R G11B B82Y B82Y
inventional inventional inventional inventional
Masamichi
Saito