Data reader with magnetic seed lamination

Abstract

A magnetic element capable of reading data may generally be configured at least with a magnetic seed lamination disposed between a data reader stack and a magnetic shield. The magnetic seed lamination may be constructed at least with one magnetic layer coupled to the bottom shield and at least one non-magnetic layer decoupling the data reader stack from the at least one magnetic layer.

1 . An apparatus comprising a magnetic seed lamination disposed between a data reader stack and a magnetic shield, the magnetic seed lamination comprising a first magnetic layer contacting and coupled to the magnetic shield, an amorphous second magnetic layer contacting the first magnetic layer and coupled to the magnetic shield, and at least one non-magnetic layer decoupling the data reader stack from the second magnetic layer. 
     
     
         2 . The apparatus of  claim 1 , wherein the data reader stack comprises an abutted junction lamination with a fixed magnetization providing pinning layer. 
     
     
         3 . The apparatus of  claim 1 , wherein the data reader stack comprises a trilayer lamination without a fixed magnetization providing layer. 
     
     
         4 . The apparatus of  claim 1 , wherein the first magnetic layer is exchange coupled to the bottom shield. 
     
     
         5 . (Withdrawn and Currently amended) The apparatus of  claim 1 , wherein the first magnetic layer is interlayer coupled to the bottom shield via the at least one non-magnetic layer. 
     
     
         6 . The apparatus of  claim 1 , wherein the seed lamination comprises multiple magnetic layers and non-magnetic layers arranged in an alternating pattern. 
     
     
         7 . The apparatus of  claim 1 , wherein a first non-magnetic layer is disposed between the first and second magnetic layers and a second non-magnetic layer is disposed between the data reader stack and the second magnetic layer. 
     
     
         8 . (canceled) 
     
     
         9 . The apparatus of  claim 7 , wherein the second non-magnetic layer contacts a pinning layer of the data reader stack. 
     
     
         10 . The apparatus of  claim 9 , wherein the data reader stack has a magnetically free layer opposite a barrier layer from the pinning layer. 
     
     
         11 . (canceled) 
     
     
         12 . The apparatus of  claim 1 , wherein the first magnetic layer has a dissimilar thickness than the at least one non-magnetic layer. 
     
     
         13 . A magnetic element comprising:
 a data reader stack;   a magnetic shield; and   a magnetic seed lamination disposed between and contacting the data reader stack and the magnetic shield, the magnetic seed lamination comprising first and second magnetic layers directly coupled to the magnetic shield and at least one non-magnetic layer decoupling the data reader stack from the first and second magnetic layers, the first magnetic layer contacting the bottom shield and the second magnetic layer being an amorphous layer.   
     
     
         14 . The magnetic element of  claim 13 , wherein the first and second magnetic layers are each exchange coupled to the bottom shield. 
     
     
         15 . The magnetic element of  claim 13 , wherein the first and second magnetic layers are dissimilar thicknesses and materials. 
     
     
         16 . The magnetic element of  claim 13 , wherein the first magnetic layer comprises an amorphous compound. 
     
     
         17 . The magnetic element of  claim 13 , wherein the second magnetic layer comprises an alloy material of the bottom shield. 
     
     
         18 - 19 . (canceled) 
     
     
         20 . The data transducer of  claim 21 , wherein the first and second magnetic layers collectively form a coupled portion magnetically coupled to the magnetic shield and the non-magnetic layer decouples the coupled portion from an immediately adjacent pinning layer of the data reader stack. 
     
     
         21 . A data transducer comprising:
 a data reader stack;   a magnetic shield; and   a magnetic seed lamination disposed between and contacting the data reader stack and the magnetic shield, the magnetic seed lamination comprising a first magnetic layer disposed between and contacting the magnetic shield and an amorphous second magnetic layer to couple the first and second magnetic layers to the magnetic shield, a non-magnetic layer disposed between and contacting the amorphous second magnetic layer and the magnetic stack to decouple the first and second magnetic layers from the data reader stack.   
     
     
         22 . The apparatus of  claim 1 , wherein the first magnetic layer comprises one of the group of NiFeNb, CoFeNb, and CoZrTa. 
     
     
         23 . The apparatus of  claim 1 , wherein the second magnetic layer comprises NiFeW. 
     
     
         24 . The apparatus of  claim 1 , wherein the at least one non-magnetic layer comprises one of the group of Ta, Pt, Zr, Nb, Au, and Rd. to block diffusion of material into the first and second magnetic layers.