Patent ID: 6806804
Filing Date: 2004-10-19
Classification: B82Y,G01R,G11B,H01F

Abstract:
A magnetic detecting element comprising:a multilayer film comprising an antiferromagnetic layer, a pinned magnetic layer, a nonmagnetic material layer and a free magnetic layer, which are laminated in that order, the free magnetic layer including a first free magnetic sub-layer and a second free magnetic sub-layer laminated on the first free magnetic sub-layer with a nonmagnetic intermediate layer provided therebetween, wherein one of: a &bgr; value of a magnetic material constituting the first free magnetic sub-layer has a positive or negative sign which is the same as that of the pinned magnetic layer and different from that of the second free magnetic sub-layer, and a &bgr; value of a magnetic material constituting the second free magnetic sub-layer has a positive or negative sign which is the same as that of the pinned magnetic layer, and different from that of the first free magnetic sub-layer, and wherein the &bgr; value is inherent to a magnetic material satisfying the relational expression, &rgr;â†“/&rgr;â†‘=(1+&bgr;)/(1âˆ’&bgr;) wherein &rgr;â†“ is a resistivity value for minority conduction electrons, and &rgr;â†‘ is a resistivity value for majority conduction electrons).