Patent ID: 6995961
Filing Date: 2006-02-07
Classification: B82Y,G01R,G11B

Abstract:
1. A magnetic sensing element having a multilayer comprising a first antiferromagnetic layer, a pinned magnetic layer, a nonmagnetic material layer and a free magnetic layer laminated in this order, a pair of second antiferromagnetic layers formed with a distance therebetween in a track width direction so as to be stacked at least on both side regions of the free magnetic layer in the track width direction, said free magnetic layer including at least one of a Ni wherein a and b in Ni wherein X in the NiFeX layer represents at least one element selected from Mn, Cu, Zn, Ti, Al, Ge, Si, Cr, V, Sn, Ir, Ru, Nb, Sb, W, Mo, Os and Ta, wherein X in the CoFeX layer represents at least one element selected from Ti, Al, Mn, Si, V, Cr, Ta, Zn, Sb, Ge, Mo and W, wherein the free magnetic layer comprises a (Co