A high performance specular free layer bottom spin valve is disclosed. This structure
made up the following layers: NiCr/MnPt/CoFe/Ru/CoFe/Cu/free layer/Cu/Ta or TaO/Al2O3.
A key feature is that the free layer is made of a very thin CoFe/NiFe composite
layer. Experimental data confirming the effectiveness of this structure is provided,
together with a method for manufacturing it and, additionally, its longitudinal
bias leads.