Patent ID: 6600638
Filing Date: 2003-07-29
Classification: B82Y,G01R,G11B

Abstract:
A spin valve (SV) magnetoresistive sensor comprising:an antiparallel (AP)-pinned layer comprising: a first ferromagnetic (FM1) layer made of (Coâ€”Fe)aâ€”Xb, wherein X is chosen from a group of materials consisting of niobium (Nb), hafnium (Hf) and niobium-hafnium (NbHf), 90%&lE;a&lE;95%, 5%&lE;b&lE;10% and a+b=100%; a second ferromagnetic (FM2) layer made of (Coâ€”Fe)aâ€”Xb, wherein X is chosen from a group of materials consisting of niobium (Nb), hafnium (Hf) and niobium-hafnium (NbHf), 90%&lE;a&lE;95%, 5%&lE;b&lE;10% and a+b=100%; and an antiferromagnetic coupling (APC) layer disposed between said FM1 and FM2 layers; a ferromagnetic free layer; and a spacer layer disposed between said FM2 layer and said free layer.