New concepts for perpendicular magnetic recording hard disk system

Yoshihisa Nakamura; Hiroaki Muraoka

doi:10.1109/20.278680

New concepts for perpendicular magnetic recording hard disk system

Yoshihisa Nakamura, Hiroaki Muraoka

Broadband Engineering Division

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

10 Citations (Scopus)

Abstract

New concepts for perpendicular magnetic recording are proposed. Recording mechanism analysis, head-to-media interface and a narrow track single-pole head are described. A finite-element method simulation, with accurate medium modelling, estimates densities over 20 kFRPM (500 kFRPI). The conditions to attain high linear density are revealed quantitatively. Coercive force dispersion of the medium and head-to-medium spacing are key factors. To realize extremely narrow spacing we have proposed contact recording, that is, a non-flying head even for hard disk systems. Using this new head-to-medium interface, a very narrow track single-pole head, 6 μm in width, is investigated. The single-pole head can be prepared with control of the domain structure by a wall pinning method. We have found that the normalized output increases as the track width decreases. The signal-to-noise ratio of a 6 μm-track-width single-pole head is about 35 dB at low density. The 10^-9error rate is obtained at 4 kFRPM (100 kFRPI) with a equalizer for read channel.

Original language	English
Pages (from-to)	4555-4560
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	27
Issue number	6
DOIs	https://doi.org/10.1109/20.278680
Publication status	Published - 1991 Nov

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/20.278680

Cite this

@article{7a8f0bf9af074ba6a2034c247cacf5e7,

title = "New concepts for perpendicular magnetic recording hard disk system",

abstract = "New concepts for perpendicular magnetic recording are proposed. Recording mechanism analysis, head-to-media interface and a narrow track single-pole head are described. A finite-element method simulation, with accurate medium modelling, estimates densities over 20 kFRPM (500 kFRPI). The conditions to attain high linear density are revealed quantitatively. Coercive force dispersion of the medium and head-to-medium spacing are key factors. To realize extremely narrow spacing we have proposed contact recording, that is, a non-flying head even for hard disk systems. Using this new head-to-medium interface, a very narrow track single-pole head, 6 μm in width, is investigated. The single-pole head can be prepared with control of the domain structure by a wall pinning method. We have found that the normalized output increases as the track width decreases. The signal-to-noise ratio of a 6 μm-track-width single-pole head is about 35 dB at low density. The 10-9error rate is obtained at 4 kFRPM (100 kFRPI) with a equalizer for read channel.",

author = "Yoshihisa Nakamura and Hiroaki Muraoka",

year = "1991",

month = nov,

doi = "10.1109/20.278680",

language = "English",

volume = "27",

pages = "4555--4560",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "6",

}

TY - JOUR

T1 - New concepts for perpendicular magnetic recording hard disk system

AU - Nakamura, Yoshihisa

AU - Muraoka, Hiroaki

PY - 1991/11

Y1 - 1991/11

N2 - New concepts for perpendicular magnetic recording are proposed. Recording mechanism analysis, head-to-media interface and a narrow track single-pole head are described. A finite-element method simulation, with accurate medium modelling, estimates densities over 20 kFRPM (500 kFRPI). The conditions to attain high linear density are revealed quantitatively. Coercive force dispersion of the medium and head-to-medium spacing are key factors. To realize extremely narrow spacing we have proposed contact recording, that is, a non-flying head even for hard disk systems. Using this new head-to-medium interface, a very narrow track single-pole head, 6 μm in width, is investigated. The single-pole head can be prepared with control of the domain structure by a wall pinning method. We have found that the normalized output increases as the track width decreases. The signal-to-noise ratio of a 6 μm-track-width single-pole head is about 35 dB at low density. The 10-9error rate is obtained at 4 kFRPM (100 kFRPI) with a equalizer for read channel.

AB - New concepts for perpendicular magnetic recording are proposed. Recording mechanism analysis, head-to-media interface and a narrow track single-pole head are described. A finite-element method simulation, with accurate medium modelling, estimates densities over 20 kFRPM (500 kFRPI). The conditions to attain high linear density are revealed quantitatively. Coercive force dispersion of the medium and head-to-medium spacing are key factors. To realize extremely narrow spacing we have proposed contact recording, that is, a non-flying head even for hard disk systems. Using this new head-to-medium interface, a very narrow track single-pole head, 6 μm in width, is investigated. The single-pole head can be prepared with control of the domain structure by a wall pinning method. We have found that the normalized output increases as the track width decreases. The signal-to-noise ratio of a 6 μm-track-width single-pole head is about 35 dB at low density. The 10-9error rate is obtained at 4 kFRPM (100 kFRPI) with a equalizer for read channel.

UR - http://www.scopus.com/inward/record.url?scp=0026256398&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026256398&partnerID=8YFLogxK

U2 - 10.1109/20.278680

DO - 10.1109/20.278680

M3 - Article

AN - SCOPUS:0026256398

SN - 0018-9464

VL - 27

SP - 4555

EP - 4560

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 6

ER -

New concepts for perpendicular magnetic recording hard disk system

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this