Current progress of single-pole-type GMR heads for perpendicular recording

Kenchi Ito; Yoshiaki Kawato; Reiko Arai; Tomohiro Okada; Moriaki Fuyama; Yoshihiro Hamakawa; Masahumi Mochizuki; Yoshitaka Nishida; Takayuki Ichihara; Hisashi Takano

doi:10.1109/TMAG.2002.988932

Current progress of single-pole-type GMR heads for perpendicular recording

Kenchi Ito, Yoshiaki Kawato, Reiko Arai, Tomohiro Okada, Moriaki Fuyama, Yoshihiro Hamakawa, Masahumi Mochizuki, Yoshitaka Nishida, Takayuki Ichihara, Hisashi Takano

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

12 Citations (Scopus)

Abstract

We studied several proposals to address the problems encountered when single-pole-type giant magnetoresistive (SPT-GMR) heads are applied to an actual recording system. The first area of problems was regarding side erasure when there is a head skew. We fabricated a trapezoid-shaped main pole using a focus-ion-beam trimming or using a new wafer-processing technique and examined their write performances and their effects on reducing side erasure. The second area of problems concerned the stray field robustness of SPT-GMR heads when combined with a double-layered perpendicular recording medium. We tried to optimize the robustness and write performance by changing the width of a yoke in the main pole or by positioning a shield above the main pole. The stray field robustness and write performance were adequate in both cases, but a tradeoff relationship exists between both performances.

Original language	English
Pages (from-to)	175-180
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	38
Issue number	1 I
DOIs	https://doi.org/10.1109/TMAG.2002.988932
Publication status	Published - 2002 Jan
Externally published	Yes

Keywords

External field robustness
Head skew
Perpendicular magnetic recording
Single pole head

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2002.988932

Cite this

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title = "Current progress of single-pole-type GMR heads for perpendicular recording",

abstract = "We studied several proposals to address the problems encountered when single-pole-type giant magnetoresistive (SPT-GMR) heads are applied to an actual recording system. The first area of problems was regarding side erasure when there is a head skew. We fabricated a trapezoid-shaped main pole using a focus-ion-beam trimming or using a new wafer-processing technique and examined their write performances and their effects on reducing side erasure. The second area of problems concerned the stray field robustness of SPT-GMR heads when combined with a double-layered perpendicular recording medium. We tried to optimize the robustness and write performance by changing the width of a yoke in the main pole or by positioning a shield above the main pole. The stray field robustness and write performance were adequate in both cases, but a tradeoff relationship exists between both performances.",

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author = "Kenchi Ito and Yoshiaki Kawato and Reiko Arai and Tomohiro Okada and Moriaki Fuyama and Yoshihiro Hamakawa and Masahumi Mochizuki and Yoshitaka Nishida and Takayuki Ichihara and Hisashi Takano",

note = "Funding Information: Manuscript received July 3, 2001. This work was supported in part by NEDO, Japan, under the ASET. The authors are with Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan (e-mail: kenchi@crl.hitachi.co.jp). Publisher Item Identifier S 0018-9464(02)01292-X.",

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AU - Ito, Kenchi

AU - Kawato, Yoshiaki

AU - Arai, Reiko

AU - Okada, Tomohiro

AU - Fuyama, Moriaki

AU - Hamakawa, Yoshihiro

AU - Mochizuki, Masahumi

AU - Nishida, Yoshitaka

AU - Ichihara, Takayuki

AU - Takano, Hisashi

N1 - Funding Information: Manuscript received July 3, 2001. This work was supported in part by NEDO, Japan, under the ASET. The authors are with Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan (e-mail: kenchi@crl.hitachi.co.jp). Publisher Item Identifier S 0018-9464(02)01292-X.

PY - 2002/1

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N2 - We studied several proposals to address the problems encountered when single-pole-type giant magnetoresistive (SPT-GMR) heads are applied to an actual recording system. The first area of problems was regarding side erasure when there is a head skew. We fabricated a trapezoid-shaped main pole using a focus-ion-beam trimming or using a new wafer-processing technique and examined their write performances and their effects on reducing side erasure. The second area of problems concerned the stray field robustness of SPT-GMR heads when combined with a double-layered perpendicular recording medium. We tried to optimize the robustness and write performance by changing the width of a yoke in the main pole or by positioning a shield above the main pole. The stray field robustness and write performance were adequate in both cases, but a tradeoff relationship exists between both performances.

AB - We studied several proposals to address the problems encountered when single-pole-type giant magnetoresistive (SPT-GMR) heads are applied to an actual recording system. The first area of problems was regarding side erasure when there is a head skew. We fabricated a trapezoid-shaped main pole using a focus-ion-beam trimming or using a new wafer-processing technique and examined their write performances and their effects on reducing side erasure. The second area of problems concerned the stray field robustness of SPT-GMR heads when combined with a double-layered perpendicular recording medium. We tried to optimize the robustness and write performance by changing the width of a yoke in the main pole or by positioning a shield above the main pole. The stray field robustness and write performance were adequate in both cases, but a tradeoff relationship exists between both performances.

KW - External field robustness

KW - Head skew

KW - Perpendicular magnetic recording

KW - Single pole head

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Current progress of single-pole-type GMR heads for perpendicular recording

Abstract

Keywords

ASJC Scopus subject areas

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