| US 7,502,210 B2 | ||
| CPP magnetic detecting device containing NiFe alloy on free layer thereof | ||
| Yosuke Ide, Niigata-ken (Japan); Masamichi Saito, Niigata-ken (Japan); Masahiko Ishizone, Niigata-ken (Japan); and Naoya Hasegawa, Niigata-ken (Japan) | ||
| Assigned to Alps Electric Co., Ltd., Tokyo (Japan) | ||
| Filed on Feb. 28, 2006, as Appl. No. 11/365,697. | ||
| Claims priority of application No. 2005-058742 (JP), filed on Mar. 03, 2005. | ||
| Prior Publication US 2006/0198062 A1, Sep. 07, 2006 | ||
| Int. Cl. G11B 5/127 (2006.01) | ||
| U.S. Cl. 360—324.12 | 7 Claims |
| 1. A magnetic detecting device comprising:
a multilayer film, which has at least one pinned magnetic layer magnetized in one direction and a free magnetic layer formed
on the pinned magnetic layer with a nonmagnetic material layer therebetween, and in which a sense current flows in the direction
perpendicular to the plane of each layer forming the multilayer film,
wherein the free magnetic layer includes a NiaFeb alloy layer (a and b are represented by at %, and satisfy the relationship of 47≤a≤77 and a+b=100),
the pinned magnetic layer includes a Co2YZ alloy layer (Y is one or more elements of Mn, Fe, and Cr, and Z is one or more elements of Al, Ga, Si, Ge, Sn, In, Sb,
Pb, and Zn), and
wherein the Co2YZ alloy has a Heusler structure.
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