Magnetic writer having multiple gaps with more uniform magnetic fields across the gaps

摘要

A magnetic device according to one embodiment includes a source of flux; a magnetic pole having two or more gaps; and a low reluctance path positioned towards at least one of the gaps and riot positioned towards at least one other of the gaps for affecting a magnetic field formed at the at least one of the gaps when the source of flux is generating flux. Other disclosed embodiments include devices having coil turns with a non-uniform placement in the magnetic yoke for altering a magnetic field formed at the at least one of the gaps during writing. In further embodiments, a geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux.

主权项

1. A magnetic device, comprising:
a source of flux comprising a thin film coil having multiple turns; a magnetic yoke coupled to the source of flux, the magnetic yoke having a pole with two or more gaps, wherein the coil turns have a non-uniform placement in the magnetic yoke for creating a higher magnetic field at one of the gaps than another of the gaps during writing, wherein the gaps are positioned and configured to each write an individual transition to a magnetic medium upon energization of the coil.