Patent ID: 7554776
Filing Date: 2009-06-30
Classification: B82Y,G01R,G11B,H01F

Abstract:
1. A magnetic sensing element comprising: a multilayer composite having a plurality of layers, the multilayer composite comprising: a pinned magnetic layer whose magnetization is fixed in one direction; a free magnetic layer; a nonmagnetic material layer disposed between the pinned magnetic layer and the free magnetic layer; and a nonmagnetic metal layer made of at least one material selected from the group consisting of X—Mn alloys, Ru, Re, Os, Ti, Rh, Ir, Pd, Pt, and Al, wherein X represents at least one element selected from the group consisting of Pt, Pd, Ir, Rh, Ru, Os, Ni, and Fe; wherein the pinned magnetic layer comprises a plurality of sublayers, has an artificial ferromagnetic structure, and is constituted of a first magnetic layer and a second magnetic layer with a nonmagnetic interlayer therebetween,