Gbit/in/sup 2/ perpendicular recording using double layer medium and MIG head

Iwasaki, S.; Ouchi, Kazuhiro; Honda, N.

doi:10.1109/20.538838

Cited by 36 publications

(10 citation statements)

References 22 publications

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“…18, it is readily apparent that demagnetization caused by random thermal fluctuation is very much suppressed in perpendicular magnetic recording. 14) The long argument between longitudinal and perpendicular recording was settled at last. It can be said that it was a moment at which the true value of perpendicular magnetic recording was recognized for the first time widely and to a great degree.…”

Section: Pathway To Realization Of Perpendicular Magnetic Recordingmentioning

confidence: 99%

Perpendicular magnetic recording -Its development and realization-

Iwasaki

2009

Proc. Jpn. Acad., Ser. B

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The principle of conventional magnetic recording is that magnetic fields are applied parallel to the plane of the magnetic medium. As described in this paper, the invention and development of a new method of placing the magnetized information perpendicular to the plane of the magnetic recording medium is presented. The yield in the mass production of high-density hard disk drives (HDDs) for perpendicular recording is much higher than that of HDDs for conventional recording. Consequently, it is estimated that as many as 75% of the 500 million HDDs to be shipped this year will use this technology.

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Section: Pathway To Realization Of Perpendicular Magnetic Recordingmentioning

confidence: 99%

Perpendicular magnetic recording -Its development and realization-

Iwasaki

2009

Proc. Jpn. Acad., Ser. B

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“…Therefore, perpendicular recording using an MR head seems the first step to the practical use of such a recording system. The use of the backlayer should be restricted to additional roles such as to control anisotropy of the media [19].…”

Section: Reconsideration For the Present Head Situationmentioning

confidence: 99%

Strategy for Implementation of Perpendicular Magnetic Recording

Iwasaki

Honda

1997

J. Magn. Soc. Jpn.

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A brief history of perpendicular magnetic recording is presented first, focusing on the strategic aspect of the study. The important role played in the earlier development of perpendicular recording system by the complementarity principle connecting longitudinal and perpendicular recording is described. It is pointed out that a new strategic study is required for perpendicular recording that is consistent with today's technologies such as merged MR heads. We should now proceed in the direction of developing and constructing a realistic recording system, using thick media with moderate coercivity.

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“…Assuming tlle core magnetic crystalline grain shape to be cubic for longitudinal media and to be tetragonal for perpendicular media, tlle Ku V IkT values are calculated as shown in Table 1 for Co and Co-alloy magnetic materials of which Ku values are experimentally determined using single crystal thin films [24][25][26]. Here, tlle dimension of the magnetic crystalline grain is assumed to be lOxlOxlO nm} for longitudinal and lOxlOx50 nm 3 for perpendicular media to realize the areal density of 10 -20 Gb/in 2 . For 30 .…”

Section: Thermal Stability Considerationmentioning

confidence: 99%

“…When this trend is maintained, several problems such as the thermal instability of recorded information and the recording head writability will become serious in the near future. Employment of perpendicular magnetic recording is an effective way to continuously increase the hard disk drive areal density while reducing these physical problems associated with longitudinal recording [3,4]' This situation is illustrated in Fig.l [5]. It is possible to use a thicker recording layer with moderate coercivity in perpendicular magnetic recording.…”

Section: Introductionmentioning

confidence: 99%

Investigation of High Density Magnetic Recording with Single-layer Perpendicular Media

et al. 1997

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Abstract---This paper describes the recent research results on magnetic recording with single-layer perpendicular recording media. This includes the thermal stability of recorded information, the linear recording density resolution, the recorded track edge profile, the media noise, the nonlinear transition shifts, the signal decay due to demagnetizing field, etc. The combination of Co-alloy single-layer perpendicular media with high perpendicular magnetic anisotropies (Mr/Ms>O.95) and ring-head writing has a high potential to increase the attainable areal density beyond 10 Gb/in 2 while avoiding or reducing the difficulties which are feared to face with the conventional longitudinal magnetic recording.

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Gbit/in/sup 2/ perpendicular recording using double layer medium and MIG head

Cited by 36 publications

References 22 publications

Perpendicular magnetic recording -Its development and realization-

Perpendicular magnetic recording -Its development and realization-

Strategy for Implementation of Perpendicular Magnetic Recording

Investigation of High Density Magnetic Recording with Single-layer Perpendicular Media

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