Thermally stable CGC perpendicular recording media with Pt-rich CoPtCr and thin Pt layers

Sonobe, Y.; Muraoka, H.; Miura, K.; Nakamura, Y.; Takano, K.; Möser, Andreas; Do, Hao; Yen, B. Linju; Ikeda, Yoshihiro; Supper, N.; Weresin, W.

doi:10.1109/tmag.2002.801810

Cited by 41 publications

(18 citation statements)

References 15 publications

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“…M-H loop slope of the CGC media increases from 1.4 to 2.2. The changing of these magnetic properties by depositing a capping layer on top of a CoCrPt-SiO 2 granular layer agrees with the result reported by Sonobe et al for CoCrPt granular layer [2].…”

Section: Experimental Methodssupporting

confidence: 91%

“…This structure is exactly the CGC structure perpendicular media proposed by Sonobe et al [2] From TEM analysis, grain size distribution of the granular layer is estimated as shown in Fig. 5.…”

Section: Magnetic Properties and Microstructuressupporting

confidence: 75%

“…The H s was significantly reduced and writability of these media was improved. In addition, CGC media with steeper slope showed equal or better SNR performance [2]. However, the relation between these read write performances and magnetic properties, microstructure of CGC media has not been clarified experimentally.…”

Section: Introductionmentioning

confidence: 99%

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Effect of continuous layer in CGC perpendicular recording media

Sonobe¹,

Tham²,

Umezawa³

et al. 2006

Journal of Magnetism and Magnetic Materials

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Section: Experimental Methodssupporting

confidence: 91%

Section: Magnetic Properties and Microstructuressupporting

confidence: 75%

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Effect of continuous layer in CGC perpendicular recording media

Sonobe¹,

Tham²,

Umezawa³

et al. 2006

Journal of Magnetism and Magnetic Materials

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“…Magnetic property control along the thickness of Co-alloy recording layer by employing a compositional gradient technique or a deposition of layers with different properties was used for tuning the medium property suitable for high areal density PMR 101,104,105) .…”

Section: Scale Down In 22 Yearsmentioning

confidence: 99%

Development of Media Nanostructure for Perpendicular Magnetic Recording

Futamoto

Ohtake

2017

J. Magn. Soc. Jpn.

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The review covers the research and development of perpendicular media nanostructure focusing on the recording layer. The recording layer material includes the Co-alloys with hcp structure, the magnetic multilayers, and the alloys with ordered structures that have high magneto-crystalline anisotropies (Ku). The technologies of underlayer or interlayer for aligning the easy magnetization axis of magnetic crystal grain perpendicular to the film plane are briefly reviewed including the high Ku magnetic materials for future recording media.Observations of compositional and magnetization structures in sub-µm scale have played important roles in improving the recording layer. Typical data on these characteristics are explained in relation to the media structure improvements. Considering that high Ku magnetic materials will be employed in future recording media, basic experimental results related in controlling the easy magnetization axis and in keeping the surface flatness of L10-ordered magnetic materials are explained. Future possibilities for increasing the areal density beyond 1 Tb/in 2 by improving the magnetic material and the nanostructure of recording layer are also discussed.

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“…In 2002, Sonobe et al [38] investigated doublelayer CGC media using a Pt-rich CoCr 22 Pt 22 (1.6 nm) continuous layer Pt (1 nm) layer on CoCr 18 Pt 12 (12 nm) on granular layer on 5 nm Ti on SUL CoZrNb (400 nm). The nucleation field was improved and the thermal decay rate was reduced.…”

Section: Hcp Coupled-granular-continuous Mediamentioning

confidence: 99%

Advancements in PMR thin-film media

Judy

2005

Journal of Magnetism and Magnetic Materials

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Thermally stable CGC perpendicular recording media with Pt-rich CoPtCr and thin Pt layers

Cited by 41 publications

References 15 publications

Effect of continuous layer in CGC perpendicular recording media

Effect of continuous layer in CGC perpendicular recording media

Development of Media Nanostructure for Perpendicular Magnetic Recording

Advancements in PMR thin-film media

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