Patent ID: 7821087
Filing Date: 2010-10-26
Classification: B82Y,G11C,H01F,H01L

Abstract:
1. A magnetic element comprising: a pinned layer; a spacer layer, the spacer layer being nonmagnetic; a free layer, the spacer layer residing between the pinned layer and the free layer, the free layer including a first ferromagnetic layer, a second ferromagnetic layer and a nonmagnetic spacer layer between the first ferromagnetic layer and the second ferromagnetic layer, the first ferromagnetic layer, the second ferromagnetic layer and the nonmagnetic spacer layer forming a synthetic antiferromagnet; wherein the magnetic element is configured to allow the free layer magnetization to be switched due to spin transfer when a write current is passed through the magnetic element; and wherein the free layer is configured to include at least one of a doped ferromagnetic material and a multilayer, the doped ferromagnetic material including at least one ferromagnetic material that is diluted with at least one of at least one nonmagnetic material and ferrimagnetically doped material such that the free layer has a low saturation magnetization; wherein if the free layer includes the at least one ferromagnetic material that is diluted with the at least one nonmagnetic material, then the free layer includes at least CoX, FeX, CoFeX, NiFeX, CoXY, FeXY, CoFeXY, NiFeXY, and/or CoNiFeXY where X or Y is Cr, Cu, Au, B, Nb, Mo, Pt, Pd, Ta, Rh, Ru, Ag, TaN, CuN, TaCuN, and/or CoFeX where X is Cr, Cu, Au, Nb, Mo, Pt, Pd, Ta, Rh, Ru, Ag, TaN, CuN, and TaCuN.