A magneto-resistive device includes first and second ferromagnetic layers having different coercivities, and a spacer layer between the first and second layers. Each ferromagnetic layer has a magnetization that can be oriented in either of two directions....http://www.google.fr/patents/US6576969?utm_source=gb-gplus-shareBrevet US6576969 - Magneto-resistive device having soft reference layer
Magneto-resistive device having soft reference layer