Studies of transition noise in media recorded by heads with trailing shields

Williams, M. L.; Weresin, W.; Lengsfield, Byron H.; Möser, Andreas; Nix, L.; Payne, R.

doi:10.1016/j.jmmm.2004.10.008

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…(If a ring head is used in conjunction with a SUL, the writing no longer takes place near the gap. Then the writing occurs at the far edge of the write pole of the ring head [50]). The field gradient is controlled by the gap length of the ring head.…”

Section: Writing With Shielded Heads and Ring Headsmentioning

confidence: 99%

The transition from longitudinal to perpendicular recording

Richter¹

2007

J. Phys. D: Appl. Phys.

255

164

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After more than 30 years of research, hard disk drives using perpendicular recording are finally commercially available. This review is a follow-up of a review written in 1999 and addresses the basic physics of perpendicular recording with special emphasis on the read and the write process and the magnetic aspects of the recording media. The paper also surveys various technical difficulties which prevented an earlier implementation of perpendicular recording. The paper closes with a short overview of alternative technologies that allow even higher storage densities.

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Section: Writing With Shielded Heads and Ring Headsmentioning

confidence: 99%

The transition from longitudinal to perpendicular recording

Richter¹

2007

J. Phys. D: Appl. Phys.

255

164

View full text Add to dashboard Cite

show abstract

High-resolution magnetic force microscopy study of high-density transitions in perpendicular recording media

Möser

Xiao

Kappenberger

et al. 2005

Journal of Magnetism and Magnetic Materials

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Write current optimization for single-pole and trailing-shield heads in perpendicular recording

Xiao

Lengsfield

Takano

et al. 2005

Journal of Applied Physics

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Recording performance as a function of write current is studied for single-pole and trailing-shield heads. Optimal write current is not obvious from saturation curves. Media noise, jitter, and error rate give better guidance. For a single-pole head, there is an optimal write current, beyond which, the field strength may continue to increase, but field gradient degrades leading to higher noise. For trailing shield achieved by reverse-flying longitudinal heads, the field magnitude and gradient from the main pole continue to improve with increasing write current. However, the return pole erasure also increases. There is a critical current, above which, partial erasure from the return pole leads to excessive noise. Finite-element modeling of these two types of write poles has been performed to confirm and understand the experimental findings.

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Studies of transition noise in media recorded by heads with trailing shields

Cited by 4 publications

References 5 publications

The transition from longitudinal to perpendicular recording

The transition from longitudinal to perpendicular recording

High-resolution magnetic force microscopy study of high-density transitions in perpendicular recording media

Write current optimization for single-pole and trailing-shield heads in perpendicular recording

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