Patent ID: 8068316
Filing Date: 2011-11-29
Classification: B82Y,G01R,G11B,H01L

Abstract:
1. A magnetoresistive sensor comprising: a first pinned-magnetization magnetic layer; a free-magnetization magnetic layer; a first separating layer for magnetic uncoupling, which separates the first pinned-magnetization magnetic layer from the free-magnetization magnetic layer; a second pinned-magnetization magnetic layer; and a second separating layer for magnetic uncoupling, which separates the second pinned-magnetization magnetic layer from the free-magnetization magnetic layer, wherein the first and second separating layers are located on either side of said free-magnetization magnetic layer, respective magnetization directions of said first pinned-magnetization magnetic layer and of said free-magnetization magnetic layer, in an absence of an external field, are substantially orthogonal, said sensor is configured to circulate a continuous current from the first pinned-magnetization magnetic layer to the second pinned-magnetization magnetic layer, and a magnetization of the second pinned-magnetization magnetic layer is oriented in an intermediate direction between the magnetization direction of the first pinned-magnetization magnetic layer and a magnetization direction of said free-magnetization magnetic layer, in the absence of the external field.