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 journalArticlepeer-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 languageEnglish
Pages (from-to)175-180
Number of pages6
JournalIEEE Transactions on Magnetics
Volume38
Issue number1 I
DOIs
Publication statusPublished - 2002 Jan

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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