Magnetization dynamics of perpendicular writers

Takano, K.

doi:10.1016/j.jmmm.2004.10.056

Cited by 11 publications

(1 citation statement)

References 5 publications

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“…An interesting curiosity is that certain magnetization patterns recorded on the adjacent tracks can effectively 'unlock' the magnetization of the pole [162,163]. A locked pole tends to have a vortex structure [167,168], which is countered by the stray field emanating from the media.…”

Section: A Problem 1: 'Media Relaxation'mentioning

confidence: 99%

The transition from longitudinal to perpendicular recording

Richter¹

2007

J. Phys. D: Appl. Phys.

254

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: A Problem 1: 'Media Relaxation'mentioning

confidence: 99%

The transition from longitudinal to perpendicular recording

Richter¹

2007

J. Phys. D: Appl. Phys.

254

164

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Micromagnetics of side shielded perpendicular magnetic recording heads

Takano

Liu

et al. 2011

Physics Procedia

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Unlocking of remanent magnetization of pole heads by medium stray fields

Richter

Palmer

Haftek

2005

Applied Physics Letters

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We report investigations of a stochastic phenomenon in which pole heads used for perpendicular recording stay magnetized after the driving current is switched off. This remanent magnetization causes erasure of the information previously written on the disk. The length of the erasure was found to be in the range of several μs up to a few ms. Surprisingly it is found that the remanent magnetization state can be reduced by magnetization patterns that already exist on the disk at the time of writing. Experimental evidence is presented which illustrates that the unlocking of the remanent state can be influenced by the type and location of these magnetization patterns. It is concluded that magnetization patterns creating rotating fields are most efficient in destroying these remanent states.

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Magnetization dynamics of perpendicular writers

Cited by 11 publications

References 5 publications

The transition from longitudinal to perpendicular recording

The transition from longitudinal to perpendicular recording

Micromagnetics of side shielded perpendicular magnetic recording heads

Unlocking of remanent magnetization of pole heads by medium stray fields

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