Patent ID: 6661623
Filing Date: 2003-12-09
Classification: B82Y,G11B

Abstract:
A magnetic transducer comprising:a nonmagnetic layer having a pair of facing surfaces; a soft magnetic layer formed on one surface of the nonmagnetic layer, the soft magnetic layer including a first soft magnetic layer and a second soft magnetic layer, the first soft magnetic layer being located away from the nonmagnetic layer and having a composition different than that of the second soft magnetic layer, the second soft magnetic layer being located between the first soft magnetic layer and the nonmagnetic layer; a ferromagnetic layer formed on the other surface of the nonmagnetic layer; an antiferromagnetic layer formed on the ferromagnetic layer on the side opposite to the nonmagnetic layer; and a soft magnetic interlayer formed in the soft magnetic layer, the soft magnetic interlayer having a thickness smaller than a thickness of the first soft magnetic layer and smaller than a thickness of the second soft magnetic layer and the soft magnetic interlayer having a magnetism and made of a material having electrical resistivity higher than the electrical resistivity of the materials making the first and second magnetic layers, wherein the first soft magnetic layer contains at least nickel in a group including nickel (Ni), cobalt (Co), iron (Fe,), tantalum (Ta), chromium (Cr), rhodium (Rh), molybdenum (Mo) and niobium (Nb); and the second soft magnetic layer contains at least cobalt in a group including nickel, cobalt and iron.