Magnetic head for perpendicular recording with magnetic loop providing non-perpendicular write field
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United States of America Patent
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Oct 24, 2006
Grant Date -
N/A
app pub date -
Nov 26, 2003
filing date -
Nov 26, 2003
priority date (Note) -
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Abstract
A magnetic head for writing information on perpendicular media has a write pole tip and a return pole tip with a media-facing area at least two orders of magnitude greater than that of the write pole tip, the return pole tip is spaced from a trailing corner of the write pole tip by a submicron nonferromagnetic gap. Magnetic flux emanating from the write pole tip is strongest adjacent the trailing corner and directed at an angle that is not perpendicular to the write pole tip. The angled flux provides increased torque to rotate magnetic dipoles in the adjacent media layer that are oriented substantially perpendicular to the disk surface. The media may have a soft magnetic underlayer that is spaced from the write pole tip by a distance similar to the gap spacing.
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