Patent ID: 7760473
Filing Date: 2010-07-20
Classification: B82Y,G01R,G11B,H01F,H01L

Abstract:
1. A magnetic detection device, comprising: a fixed magnetic layer having a fixed magnetization; and a free magnetic layer being formed on the fixed magnetic layer with a non-magnetic material layer interposed therebetween and having a magnetization varied by an exterior magnetic field, wherein the fixed magnetic layer has a laminated ferri-structure including a first fixed magnetic layer, a second fixed magnetic layer, and a non-magnetic intermediate layer interposed therebetween, and the second fixed magnetic layer contacts the non-magnetic material layer, wherein a part of the second fixed magnetic layer is formed of a first Heusler-alloy layer represented in a formula Co wherein the content y is in the range of about 20 to 30 at % and a Fe ratio z in MnFe is in the range of about 0.2 to 0.8.