Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1802348 | Journal of Magnetism and Magnetic Materials | 2008 | 6 Pages |
Abstract
As the magnetic moment of soft under layer (SUL) decreases, the magnetic saturation during the write process becomes severe. It induces some partial erasures in the media write pattern and results in poor write performance such as an output roll-off and signal-to-noise ratio degradation. This erasure is due to the head field longitudinal component at the write gap after the transition writing in the trailing shielded pole perpendicular recording head. In case the SUL has low magnetic moment and high write current is inputted, erasure bubble appears next to the write bubble because the head field perpendicular component switches from positive to negative in the polarity. But the erasure appears even without the negative perpendicular field, and the longitudinal head field of the write gap is dominant for the erasure.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Kenichi Takano, Lijie Guan, Yuchen Zhou, Yue Liu, Joe Smyth, Moris Dovek,