Patent ID: 8125744

Claim:
A current perpendicular to plane magneto-resistance effect element, comprising: a magneto-resistance effect film comprised of a fixed magnetization layer of which a magnetization is fixed in one direction, a free magnetization layer of which a magnetization is changed in accordance with an external magnetic field, and a complex spacer layer including an insulating layer and current paths formed through said insulating layer; a biasing mechanism for stabilizing said free magnetization layer; a shielding mechanism for ensuring a reproducing resolution of said magneto-resistance effect element; and a pair of electrodes for flowing a current perpendicular to a film surface of said magneto-resistance effect element, wherein a resistance area product (RA:Ω×μm 2 ) is set to RA (Ω×μm 2 )≦0.00062(Ω×√{square root over (μm)})×√{square root over ((GAP)(nm))}{square root over ((GAP)(nm))}×TW(nm)+0.06(Ω×μ 2 ) when a track width of said magneto-resistance effect element is defined as TW and a gap length of said magneto-resistance effect element is defined as GAP.