High field-gradient design of single-pole write-head with planar pole structure

Kiyoshi Yamakawa; Hiroaki Muraoka; Kinya Fudano; Simon John Greaves; Yuichi Ohsawa; Kazuyuki Ise; Yoshihisa Nakamura

doi:10.1109/TMAG.2009.2036587

High field-gradient design of single-pole write-head with planar pole structure

Kiyoshi Yamakawa, Hiroaki Muraoka, Kinya Fudano, Simon John Greaves, Yuichi Ohsawa, Kazuyuki Ise, Yoshihisa Nakamura

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	730-737
Number of pages	8
Journal	IEEE Transactions on Magnetics
Volume	46
Issue number	3 PART 1
DOIs	https://doi.org/10.1109/TMAG.2009.2036587
Publication status	Published - 2010 Mar 1

Keywords

Field gradient
Index Terms-Cross-track grooved SUL
Shielded planar head
Soft guard band
Three-step-tapered pole

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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abstract = "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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AU - Ohsawa, Yuichi

AU - Ise, Kazuyuki

AU - Nakamura, Yoshihisa

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