Co-Pt Clusters on a Highly Oriented Fe-Co Soft Underlayer in a Co-Pt-TiO2 Perpendicular Medium

Shintaku, K.

doi:10.3379/jmsjmag.30.515

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…A novel granular structure of the recording layer, namely, well-isolated clusters composed of 5-15 small CoPt grains 4-7 nm in diameter segregated by TiO 2, was reported in this system 3) . The structure control of the recording layer is another interest.…”

Section: Introductionmentioning

confidence: 80%

New Design for Obtaining Intermediate Layer of 2 nm in Granular-type Perpendicular Magnetic Recording Media

Shintaku

2008

J. Magn. Soc. Jpn.

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A new granular-type perpendicular magnetic recording media was designed to reduce the intermediate layer thickness. A medium with Ru intermediate layer of only 2 nm was prepared successfully on a highly oriented high-B s FeCo soft underlayer (SUL). The CoPt-TiO2 recording layer had a high crystal orientation, a high Hc of 6.5 kOe, and a high squareness ratio of 0.99. The magnetic property of the SUL was also good. The granular structure of the CoPt-TiO 2 recording layer in the new-designed medium is similar to that in the old-designed one.

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Section: Introductionmentioning

confidence: 80%

New Design for Obtaining Intermediate Layer of 2 nm in Granular-type Perpendicular Magnetic Recording Media

Shintaku

2008

J. Magn. Soc. Jpn.

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“…Large columns were formed from the Pt layer to the CoPt-TiO2 layer. The widths of the columns were constant 11) .…”

Section: Re Duction Of Feco Sul Thicknessmentioning

confidence: 99%

Reduction of Crystalline High-Bs Soft Underlayer Thickness for Obtaining Low Medium Noise in Epitaxial Perpendicular Recording Media

Shintaku

2010

J. Magn. Soc. Jpn.

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CoPt-TiO2 granular-type media with extremely thin Ru intermediate layer of 1.9 nm were prepared on a highly oriented high-Bs FeCo soft underlayer (SUL) pinned by an IrMn antiferromagnetic layer. The FeCo SUL thickness was changed to reduce the medium noise. CoPt clusters surrounded by relatively wide boundaries were formed for the medium with the FeCo SUL of 40 nm. As the FeCo SUL thickness was decreased, the cluster size and the number of the CoPt grains was decreased. The CoPt grains were mostly isolated for the medium with the FeCo SUL of 20 nm. The average cluster size was 7.4 nm in diameter. The recording performance was evaluated by using a single-pole-type head. This new-designed medium has high writability and large reproduced output compared to an old-designed medium with an amorphous SUL of 80 nm and an intermediate layer of 30 nm. As the FeCo SUL thickness was decreased down to 10 nm, the medium noise was greatly decreased at the recording densities of more than 200 kfci. As a result, the S/N was increased as the FeCo SUL thickness was decreased down to 10 nm at the recording densities of more than 200 kfci. The film thickness of the FeCo SUL could be reduced down to 10-20 nm.

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“…A novel granular structure of the recording layer, namely, wellisolated clusters composed of 5-15 small CoPt grains 4-7 nm in diameter segregated by TiO 2 , was reported in this system [3]. The structure control of the recording layer is another point of interest.…”

Section: Introductionmentioning

confidence: 97%

Preparation and recording characteristics of granular-type perpendicular magnetic recording media with thin intermediate layer

Shintaku

Kiya

2008

Journal of Magnetism and Magnetic Materials

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Co-Pt Clusters on a Highly Oriented Fe-Co Soft Underlayer in a Co-Pt-TiO2 Perpendicular Medium

Cited by 4 publications

References 6 publications

New Design for Obtaining Intermediate Layer of 2 nm in Granular-type Perpendicular Magnetic Recording Media

New Design for Obtaining Intermediate Layer of 2 nm in Granular-type Perpendicular Magnetic Recording Media

Reduction of Crystalline High-Bs Soft Underlayer Thickness for Obtaining Low Medium Noise in Epitaxial Perpendicular Recording Media

Preparation and recording characteristics of granular-type perpendicular magnetic recording media with thin intermediate layer

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