Magnetic reading head used in computers contains spin valve sensor with ferromagnetic free layer, ferromagnetic anchored layer structure, and non-magnetic electrically conducting layer

摘要

Magnetic reading head (72) contains a spin valve sensor (130) with a ferromagnetic free layer whose magnetic moment can rotate in reaction to a signal field free from a first direction, a ferromagnetic anchored layer structure having a magnetic moment, a non-magnetic electrically conducting intermediate layer between the free and anchored layer structure, an antiferromagnetic anchoring structure (132) coupled with the anchored layer structure to establish the magnetic moment of the anchored layer structure in a second direction, and a two-layered base layer structure with a first metal oxide base layer and a second non-magnetic metal base layer.