Patent ID: 7602591
Filing Date: 2009-10-13
Classification: B82Y,G01R,G11B,H01F,H01L

Abstract:
1. A magnetoresistive element comprising: a free layer having an adjustable magnetization direction in response to an external magnetic field, said free layer comprising a first free sublayer having a magnetization direction that rotates in response to an external magnetic field; a second free sublayer having a magnetization direction that rotates in response to an external magnetic field, wherein said first free sublayer and said second free sublayer are separated by a first spacer, and said first free sublayer has a higher perpendicular magnetic anisotropy than that of said second free sublayer; and a pinned layer having a substantially fixed magnetization direction, wherein said pinned layer is separated from said free layer by a second spacer, and said second free sublayer is between said first spacer and said second spacer, wherein a polarization of the first free sublayer is substantially lower than that of the second free sublayer.