The present invention provides a magnetic writer. The magnetic writer
comprises a write circuit, a write pole, a first write coil for inducing
a first magnetic field in the write pole by a first current provided by
the write circuit, and a second write coil for inducing a second magnetic
field in the write pole by a second current provided by the write
circuit. The write circuit provides a first current through the first
coil and a second current through the second coil. The write circuit
controls the direction of the first current and the second current so
that, during writing, the first magnetic field and the second magnetic
field have components perpendicular to the air bearing surface that are
in the same direction. When not writing, the first magnetic field and
second magnetic field have components perpendicular to the air bearing
surface in opposite directions.