Magnetic film for magnetic head

Abstract

The magnetic film includes an FeCo layer, restrains erasing data by a magnetic field leaked from a magnetic pole, has high saturation magnetic flux density and soft magnetism and writes data with high recording density. The magnetic film for a magnetic head of the present invention comprises: a nonmagnetic layer including at least one selected from a group of Ru, Rh, Ir, Cr, Cu, Au, Ag, Pt and Pd; a magnetic layer including Fe and Co. Anisotropy magnetic field is 0.8 kA/m or more.

1 . A magnetic film for a magnetic head, comprising: 
 nonmagnetic layers, each of which has a first layer section and a second layer section; and    magnetic layers, each of which includes Fe and Co;    wherein the first layer section and the second layer section are respectively include at least one selected from a group of Ru, Rh, Ir, Cr, Cu, Au, Ag, Pt and Pd;    said nonmagnetic layer and said magnetic layer are alternately piled; and    thickness of each magnetic layer is 100 nm or less.    
     
     
         2 . The magnetic film according to  claim 1 , wherein said magnetic layer includes 40-80 at % of Fe.  
     
     
         3 . A magnetic film for a magnetic head, comprising: 
 a nonmagnetic layer, which has a first layer section and a second layer section; and    a magnetic layer, which includes Fe and Co;    wherein the first layer section and the second layer section are respectively include at least one selected from a group of Ru, Rh, Ir, Cr, Cu, Au, Ag, Pt and Pd;    boundary parts of said magnetic layer, which contact said nonmagnetic layer, includes 30-65 at % of Fe; and    an intermediate part of said magnetic layer, which is formed between the boundary parts, includes 40-80 at % of Fe.    
     
     
         4 . The magnetic film according to  claim 3 , wherein thickness of said magnetic layer is 100 nm or less.  
     
     
         5 . The magnetic film according to  claim 1 , wherein roughness of the surface of said magnetic layer is 2 nm or less.  
     
     
         6 . The magnetic film according to  claim 3 , wherein roughness of the surface of said magnetic layer is 2 nm or less.  
     
     
         7 . The magnetic film according to  claim 1 , wherein total saturation magnetic flux density is 2.0 T or more.  
     
     
         8 . The magnetic film according to  claim 3 , wherein total saturation magnetic flux density is 2.0 T or more.