Patent ID: 6317297
Filing Date: 2001-11-13
Classification: B82Y,G01R,G11B,H01F

Abstract:
A magnetoresistive sensor comprising:a first pinned multilayer including a first magnetic layer and a second magnetic layer separated by a first nonmagnetic layer, the first magnetic layer being antiferromagnetically coupled with the second magnetic layer;a free layer;a first spacer layer disposed between the first pinned multilayer and the free layer;a second pinned multilayer including a third magnetic layer, a fourth magnetic layer, and a fifth magnetic layer, the fourth magnetic layer separated from the third magnetic layer by a second nonmagnetic layer, the fifth magnetic layer being separated from the fourth magnetic layer by a third nonmagnetic layer, the third magnetic layer being antiferromagnetically coupled with the fourth magnetic layer, the fifth magnetic layer being antiferromagnetically coupled with the fourth magnetic layer; anda second spacer layer disposed between the free layer and the second pinned multilayer;wherein the first pinned multilayer and the second pinned multilayer are pinned by a current carried by the magnetoresistive sensor during use.