Patent ID: 8264799

Claim:
A magnetic recording head, comprising: a recording magnetic pole; a magnetic device juxtaposed with the recording magnetic pole; and a magnetic reproducing device, the magnetic device including: a first magnetic layer having at least one magnetic material layer; a second magnetic layer having at least one magnetic material layer; a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer; a third magnetic layer including a ferromagnetic material with a magnetization oriented in a parallel or perpendicular direction to a film plane; and a pair of electrodes operable to pass a current through a laminated body including the first and second magnetic layers, the first nonmagnetic layer, and the third magnetic layer, wherein the first magnetic layer has a saturation magnetization Ms 1 and a thickness t 1 , the second magnetic layer has a saturation magnetization Ms 2 and a thickness t 2 , and Ms 1 ×t 1 is generally equal to Ms 2 ×t 2 .