Patent ID: 8564903

Claim:
A PMR head comprising: a main pole having an ABS end and a surface forming a first edge of a write gap; a trailing shield having an edge that is co-planar with said ABS end, wherein said trailing shield has a surface forming a second edge of said write gap that is separated from said first edge; a write gap layer filling the space formed by the separation of said first, and second surfaces, wherein said write gap layer has antiferromagnetic properties; whereby a magnetic write field is produced within said write gap layer resulting from an antiferromagnetic coupling produced by said antiferromagnetic properties of said write gap layer, wherein said antiferromagnetic coupling is between magnetizations of said main pole and magnetizations of said trailing shield, wherein said antiferromagnetic coupling aligns said magnetizations, whereby a combined magnetic field produced by said antiferromagnetically coupled magnetizations of said main pole and said trailing shield has a reduced horizontal component relative to said ABS and an enhanced component perpendicular to said ABS within a region between said main pole and said trailing shield corresponding to said write gap layer and wherein said enhanced flux component thereby enhances the write field strength and the field gradient.