Patent ID: 7916436
Filing Date: 2011-03-29
Classification: B82Y,G01R,G11B,H01F,H01L

Abstract:
1. A tunneling magnetic sensor comprising, from bottom to top: a first magnetic layer; an insulating barrier layer that comprises titanium oxide (Ti—O); and a second magnetic layer, wherein one of the first and second magnetic layers is a pinned magnetic layer whose magnetization direction is fixed and the other magnetic layer is a free magnetic layer whose magnetization direction is changed by an external magnetic field, wherein the free magnetic layer comprises a soft magnetic layer and an enhancement layer that is disposed between the soft magnetic layer and the insulating barrier layer, and wherein a platinum layer is disposed in at least one of positions between the insulating barrier layer and the first magnetic layer, between the insulating barrier layer and the second magnetic layer, and between the soft magnetic layer and the enhancement layer.