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Writer Footprint Measurement on Spinstand and Media Transition Curvature Characteristics

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6 Author(s)
Zhi-Min Yuan ; Data Storage Inst., A-Star, Singapore, Singapore ; Chun Lian Ong ; Shiming Ang ; Bo Liu
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The head media integration played a very important role to push up the areal density of perpendicular recording successfully. Besides the success of good sensitivity and high resolution reader at desired feature size of recording bit, the advanced writing process is the key enabler to sustain the areal density growth continuously. The sharper field gradient of writer and the narrower switching field distribution of recording media improve the transition jitter and promote the SNR of recording media. Without reducing grain size, the areal density of perpendicular recording has been increased by a few times. In this work, we investigate the performance of writing process via the measurement of head field footprint in recording media on the Spinstand. The feature size variations of head footprint at different writing current and different flying height (FH) illustrate the effective writing process visually. The transition curvature with transition width value at the trailing edge of writer pole is the key indicator to show the linear density capability related to writing process.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 5 )

Date of Publication:

May 2012

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