Patent ID: 7558028

Claim:
A magnetic head including a read sensor, comprising: a reference magnetic layer a free magnetic layer; a spacer layer being disposed between said reference magnetic layer and said free magnetic layer; wherein at least one of said free magnetic layer and said reference magnetic layer is comprised of a plurality of layers comprising at least two magnetic layers having a direction of magnetization that is in the same direction and that are comprised of Co 2 MnX where X is a material selected from the group consisting of Ge, Si, Al, Ga and Sn, and at least one nonmagnetic layer that is comprised of a material selected from the group consisting of Ni 3 Sn, Ni 3 Sb, Ni 2 LiGe, Ni 2 LiSi, Ni 2 CuSn, Ni 2 CuSb, Cu 2 NiSn, Cu 2 NiSb, Cu 2 LiGe and Ag 2 L; and wherein said spacer layer is comprised of a material selected from the group consisting of Ni 3 Sn, Ni 3 Sb, Ni 2 LiGe, Ni 2 LiSi, Ni 2 CuSn, Ni 2 CuSb, Cu 2 NiSn, Cu 2 NiSb, Cu 2 LiGe and Ag 2 LiSn.