Patent ID: 8462469
Filing Date: 2013-06-11
Classification: G01R,G11B,H01F,H01L

Abstract:
1. A magneto-resistive effect (MR) element, comprising: a magneto-resistive (MR) stack that is provided with a magnetization free layer of which a magnetization direction changes according to an external magnetic field and that detects a change of the external magnetic field as an electrical resistance change based on a MR effect; a bias magnetic field application layer that is positioned on a side of the MR stack, which excludes an air bearing surface, with respect to a lamination direction; a lower shield layer that is positioned on a lower side of the MR stack and the bias magnetic field application layer with respect to the lamination direction; and an insulation film that insulates the bias magnetic field application layer from the MR stack and the lower shield layer, wherein the bias magnetic field application layer includes: the insulation film is a MgO insulation film that is formed of oxide magnesium (MgO), that is provided between the MR stack and the Pt seed layer and between the lower shield layer and the PT seed layer in a contact manner with the Pt seed layer.