Patent ID: 8472150
Filing Date: 2013-06-25
Classification: B82Y,G01R,G11B,H01F,H01L

Abstract:
1. A giant magneto-resistive effect device (CPP-GMR device) having a CPP (current perpendicular to plane) structure comprising a spacer layer, and a first ferromagnetic layer and a second ferromagnetic layer stacked one upon another with said spacer layer interposed between them, with a sense current applied in a stacking direction, wherein: said spacer layer comprises a first nonmagnetic metal layer and a second nonmagnetic metal layer, each comprising a nonmagnetic metal material, and a semiconductor oxide layer interposed between said first nonmagnetic metal layer and said second nonmagnetic metal layer, said semiconductor oxide layer comprises zinc oxide as its main component and an additive metal, said additive metal is at least one metal selected from the group consisting of Ag, Pt, Au and Sn, and the content of said additive metal is 1.0 to 8.0 metal atomic %, and said semiconductor oxide layer has a thickness of 1.6 to 2.2 nm.