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High Field-Gradient Design of Single-Pole Write-Head With Planar Pole Structure

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7 Author(s)
Yamakawa, K. ; RIEC, Tohoku Univ., Sendai, Japan ; Muraoka, H. ; Fudano, K. ; Greaves, S.J.
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A planar single-pole head generating a large head field was investigated to improve head field distribution with a steep field gradient. Good writing performance is generally difficult for a narrow track writer. This work presents a novel design of the main pole shape, the three-step-slope, to achieve a high gradient and strong write head field for terabit recording. Furthermore, the medium design was investigated to increase head-to-medium interaction for achieving a high field gradient and narrow field distribution. A soft guard band in the recording layer and a cross-track groove on the SUL surface were effective for improving the field gradient.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 3 )