Temperature dependence of the magnetic properties of L11-type Co-Ni-Pt ordered alloy films for thermally assisted recording media

Junichi Sayama; Takehito Shimatsu; Hiroaki Nemoto; Satoshi Okamoto; Osamu Kitakami; Hajime Aoi

doi:10.1063/1.3608123

Temperature dependence of the magnetic properties of L1₁-type Co-Ni-Pt ordered alloy films for thermally assisted recording media

Junichi Sayama, Takehito Shimatsu, Hiroaki Nemoto, Satoshi Okamoto, Osamu Kitakami, Hajime Aoi

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

6 Citations (Scopus)

Abstract

We developed L1₁-type Co-Ni-Pt ordered alloy films for use as a material for creating thermally assisted magnetic recording media with high recording densities. We examined the temperature dependence of magnetic properties of L1₁-type (Co_1-xNi _x)₅₀Pt₅₀ ordered alloy films. These films had a uniaxial magnetic anisotropy of 10⁷ erg/cm³ at an x of less than ∼ 0.8. The Curie point was monotonously reduced when the Ni content steadily increased. The composition of Co₁₅Ni ₃₅Pt₅₀ (x =0.7) provided both a high magnetic anisotropy of 1.4×10⁷ erg/cm³ and a low Curie point of 583 K, which are favorable for thermally assisted magnetic recording media.

Original language	English
Article number	013918
Journal	Journal of Applied Physics
Volume	110
Issue number	1
DOIs	https://doi.org/10.1063/1.3608123
Publication status	Published - 2011 Jul 1

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title = "Temperature dependence of the magnetic properties of L11-type Co-Ni-Pt ordered alloy films for thermally assisted recording media",

abstract = "We developed L11-type Co-Ni-Pt ordered alloy films for use as a material for creating thermally assisted magnetic recording media with high recording densities. We examined the temperature dependence of magnetic properties of L11-type (Co1-xNi x)50Pt50 ordered alloy films. These films had a uniaxial magnetic anisotropy of 107 erg/cm3 at an x of less than ∼ 0.8. The Curie point was monotonously reduced when the Ni content steadily increased. The composition of Co15Ni 35Pt50 (x =0.7) provided both a high magnetic anisotropy of 1.4×107 erg/cm3 and a low Curie point of 583 K, which are favorable for thermally assisted magnetic recording media.",

author = "Junichi Sayama and Takehito Shimatsu and Hiroaki Nemoto and Satoshi Okamoto and Osamu Kitakami and Hajime Aoi",

note = "Funding Information: This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) as a “Development of Nanobit Technology for Ultrahigh Density Magnetic Recording (Green IT Project).”",

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T1 - Temperature dependence of the magnetic properties of L11-type Co-Ni-Pt ordered alloy films for thermally assisted recording media

AU - Sayama, Junichi

AU - Shimatsu, Takehito

AU - Nemoto, Hiroaki

AU - Okamoto, Satoshi

AU - Kitakami, Osamu

AU - Aoi, Hajime

N1 - Funding Information: This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) as a “Development of Nanobit Technology for Ultrahigh Density Magnetic Recording (Green IT Project).”

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Y1 - 2011/7/1

N2 - We developed L11-type Co-Ni-Pt ordered alloy films for use as a material for creating thermally assisted magnetic recording media with high recording densities. We examined the temperature dependence of magnetic properties of L11-type (Co1-xNi x)50Pt50 ordered alloy films. These films had a uniaxial magnetic anisotropy of 107 erg/cm3 at an x of less than ∼ 0.8. The Curie point was monotonously reduced when the Ni content steadily increased. The composition of Co15Ni 35Pt50 (x =0.7) provided both a high magnetic anisotropy of 1.4×107 erg/cm3 and a low Curie point of 583 K, which are favorable for thermally assisted magnetic recording media.

AB - We developed L11-type Co-Ni-Pt ordered alloy films for use as a material for creating thermally assisted magnetic recording media with high recording densities. We examined the temperature dependence of magnetic properties of L11-type (Co1-xNi x)50Pt50 ordered alloy films. These films had a uniaxial magnetic anisotropy of 107 erg/cm3 at an x of less than ∼ 0.8. The Curie point was monotonously reduced when the Ni content steadily increased. The composition of Co15Ni 35Pt50 (x =0.7) provided both a high magnetic anisotropy of 1.4×107 erg/cm3 and a low Curie point of 583 K, which are favorable for thermally assisted magnetic recording media.

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Temperature dependence of the magnetic properties of L1₁-type Co-Ni-Pt ordered alloy films for thermally assisted recording media

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