Relationship Between Head Design and Media Remanent Magnetization in Perpendicular Magnetic Recording

Takano, K.; Sakai, Masanori; Smyth, J.; Dovek, M.

doi:10.1109/tmag.2006.888197

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…A medium can fully be written if the vectorial addition of the three contributions exceeds the angle dependent switching field when the medium continues to move downstream [26,72]. This condition is most stringent if the medium is almost fully magnetized.…”

Section: 32mentioning

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: 32mentioning

confidence: 99%

The transition from longitudinal to perpendicular recording

Richter¹

2007

J. Phys. D: Appl. Phys.

255

164

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“…The MP positive footprint is clearly observed and the shape is a reverse trapezoid with a curvature at the leading and trailing boundary. The center hole like a donut shape comes from the media field by the DC magnetized background [3]. The magnetization of the MP center region is not assisted for the reversal by the surrounded DC magnetization and the center hole is not observed on the AC background condition.…”

Section: Footprint Studymentioning

confidence: 96%

“…The head overall structure is two coil windings from the both sides and implements one side magnetic flux path with a trailing side return. The bottom coil is required to suppress the adjacent track erasure, which works same as a helical coil [3], and the one side magnetic path of the trailing side is for better head field gradient. The head MP is made of 24 kG material and shielded by the TS with a small write gap.…”

Section: Micromagnetic Modelmentioning

confidence: 99%

“…The erase bubble is much wider than the write bubble in the cross-track direction and it suggests the origin of wide tracks erasure. We carefully compared them to the head field contour map of each component, H y , H x , in-plane H xz , effective head field H eff , and perpendicular corresponding head field H cor for media switching field, which is derived from a micromagnetic simulation [3]. In Fig.…”

Section: Footprint Studymentioning

confidence: 99%

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Low moment SUL effects on write performances in a trailing shielded pole PMR head

Takano¹,

Guan²,

Zhou³

et al. 2008

Journal of Magnetism and Magnetic Materials

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“…Consequently, we took into account that the phenomenon came from the negative field around the edge of the trailing shield [6], [7]. Fig.…”

Section: A Recording Characteristicsmentioning

confidence: 99%

Influence of Negative Field on Media Noise in Combinations of Capped Medium and Shielded Pole Heads

et al. 2008

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In this study, a new mechanism responsible for the increase in media noise in perpendicular magnetic recording is discussed. We observed that the media noise of a particular linear density drastically increased for some combinations of shielded pole heads and capped media with higher s of cap layers and thinner SUL. A MFM observation indicated that the transition jitter increased at a linear density, which correlated with the domain width in the AC-erased region. It was assumed that the reconstruction of the magnetic domains due to the negative field around the trailing shield occurred when the transition period was comparable to the magnetic cluster size. These results indicated that the optimization of the field at the edge of the trailing shield and that of the magnetic characteristics for the cap layer were important for improving the overall R/W performance.Index Terms-Capped medium, media noise, negative field, perpendicular magnetic recording, shielded pole head.

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Relationship Between Head Design and Media Remanent Magnetization in Perpendicular Magnetic Recording

Cited by 7 publications

References 8 publications

The transition from longitudinal to perpendicular recording

The transition from longitudinal to perpendicular recording

Low moment SUL effects on write performances in a trailing shielded pole PMR head

Influence of Negative Field on Media Noise in Combinations of Capped Medium and Shielded Pole Heads

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