Patent ID: 8514616

Claim:
A magnetoresistive effect element comprising: a magnetization free layer; a non-magnetic insertion layer configured to be provided adjacent to said magnetization free layer; a magnetic insertion layer configured to be provided adjacent to said non-magnetic insertion layer and opposite to said magnetization free layer with respect to said non-magnetic insertion layer; a spacer layer configured to be provided adjacent to said magnetic insertion layer and opposite to said non-magnetic insertion layer with respect to said magnetic insertion layer; and a first magnetization fixed layer configured to be provided adjacent to said spacer layer and opposite to said magnetic insertion layer with respect to said spacer layer, wherein said magnetization free layer and said first magnetization fixed layer have magnetization components in directions approximately perpendicular to a film surface, wherein said magnetization free layer includes: two magnetization fixed portions, and a domain wall motion portion arranged between said two magnetization fixed portions, wherein magnetization of one of said two magnetization fixed portions and magnetization of the other of said two magnetization fixed portions are fixed approximately anti-parallel to each other in a direction approximately perpendicular to a film surface, and wherein said domain wall motion portion has a magnetic anisotropy in a direction perpendicular to a film surface.