Thin-film magnetic head for perpendicular magnetic recording

Abstract

A thin-film magnetic head for perpendicular magnetic recording includes a nonmagnetic conductive elevation layer disposed under a main magnetic pole layer. The nonmagnetic conductive elevation layer and the main magnetic pole layer forms a trapezoidal shape converging toward an auxiliary magnetic pole layer, viewed from a face opposing a recording medium. The thin-film magnetic head for perpendicular magnetic recording includes an auxiliary magnetic pole layer, the main magnetic pole layer, and a nonmagnetic insulating layer disposed therebetween at a surface facing the recording medium.

What is claimed is:  
     
         1 . A thin-film magnetic head for perpendicular magnetic recording comprising: 
 an auxiliary magnetic pole layer;    a main magnetic pole layer; and    a nonmagnetic insulating layer disposed therebetween, the main magnetic pole layer having a substantially trapezoidal shape converging toward the auxiliary magnetic pole layer viewed from a face opposing a recording medium,    wherein a nonmagnetic conductive elevating layer is disposed under the main magnetic pole layer, the nonmagnetic conductive elevating layer forming the trapezoidal shape with the main magnetic pole layer.    
     
     
         2 . The thin-film magnetic head for perpendicular magnetic recording according to  claim 1 , further comprising a nonmagnetic conductive cover layer disposed on the main magnetic pole layer, the nonmagnetic conductive cover layer forming the trapezoidal shape with the main magnetic pole layer and the nonmagnetic conductive elevating layer.  
     
     
         3 . The thin-film magnetic head for perpendicular magnetic recording according to  claim 1 , wherein the nonmagnetic conductive elevating layer has a thickness of at least 50 nm.  
     
     
         4 . The thin-film magnetic head for perpendicular magnetic recording according to  claim 1 , wherein the nonmagnetic conductive elevating layer comprises NiP, Au, NiW, NiMo, NiPd, NiCr, Pd, Cr, or Cu.  
     
     
         5 . The thin-film magnetic head for perpendicular magnetic recording according to  claim 2 , wherein the nonmagnetic conductive cover layer comprises NiP, Au, NiW, NiMo, NiPd, NiCr, Pd, Cr, or Cu.  
     
     
         6 . The thin-film magnetic head for perpendicular magnetic recording according to  claim 1 , wherein the main magnetic pole layer comprises NiFe—X wherein X represents at least one component selected from the group consisting of Tc, Ru, Rh, Pd. Re, Os, Ir, Pt, and S; FeCo—X′ wherein X′ represents at least one component selected from the group consisting of Pd, Pt, Ru, Ir, Ni, Cr, and Rh; or FeCo.