Patent ID: 6493196
Filing Date: 2002-12-10
Classification: B82Y,G01R,G11B,Y10T

Abstract:
A spin-valve magnetoresistive sensor comprising:a free layer of a ferromagnetic material; a non-magnetic layer provided on said free layer; a pinned layer provided on said non-magnetic layer; and a pinning layer of an anti-ferromagnetic material provided on said pinned layer, said anti-ferromagnetic material being an ordered alloy containing manganese; said pinned layer comprising: a first pinned layer of a ferromagnetic material; a second pinned layer of a ferromagnetic material provided on said first pinned layer; an intermediate layer interposed between said first and second pinned layers such that said first and second pinned layers establish a super-exchange interaction in an anti-parallel manner; said second pinned layer having a magnetic moment smaller than a magnetic moment of said first pinned layer.