Study on increasing the coercivity of CoCrPtB media with high Pt content

M. Mikami; D. D. Djayaprawira; H. Domon; S. Yoshimura; Migaku Takahashi; K. Komiyama

doi:10.1063/1.1452256

Study on increasing the coercivity of CoCrPtB media with high Pt content

M. Mikami, D. D. Djayaprawira, H. Domon, S. Yoshimura, Migaku Takahashi, K. Komiyama

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

8 Citations (Scopus)

Abstract

The dependence of magnetic properties and microstructure on the composition of CrMo _x (x=0-40at.%) underlayer and CoCr-based nonmagnetic interlayer has been examined for CoCr ₁₈Pt ₂₀B ₄ longitudinal media. In the media using a single CrMo (10 nm) underlayer, the highest coercivity that can be obtained is only 1.9 kOe. The coercivity is drastically increased up to 5.0 and 6.4 kOe by using substrate/Cr (5 nm)/CrMo (5 nm) dual underlayer and substrate/CrMo (10nm)/CoCr ₃₈Mo ₂ (1.3 nm), respectively. It is clarified that the improvement of the coercivity is mainly due to the enhancement of the quality of the crystal growth of the magnetic layer, which results in the improvement of magnetocrystalline anisotropy field and in-plane crystallographic orientation.

Original language	English
Pages (from-to)	7074-7076
Number of pages	3
Journal	Journal of Applied Physics
Volume	91
Issue number	10 I
DOIs	https://doi.org/10.1063/1.1452256
Publication status	Published - 2002 May 15

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Study on increasing the coercivity of CoCrPtB media with high Pt content",

abstract = "The dependence of magnetic properties and microstructure on the composition of CrMo x (x=0-40at.%) underlayer and CoCr-based nonmagnetic interlayer has been examined for CoCr 18Pt 20B 4 longitudinal media. In the media using a single CrMo (10 nm) underlayer, the highest coercivity that can be obtained is only 1.9 kOe. The coercivity is drastically increased up to 5.0 and 6.4 kOe by using substrate/Cr (5 nm)/CrMo (5 nm) dual underlayer and substrate/CrMo (10nm)/CoCr 38Mo 2 (1.3 nm), respectively. It is clarified that the improvement of the coercivity is mainly due to the enhancement of the quality of the crystal growth of the magnetic layer, which results in the improvement of magnetocrystalline anisotropy field and in-plane crystallographic orientation.",

author = "M. Mikami and Djayaprawira, {D. D.} and H. Domon and S. Yoshimura and Migaku Takahashi and K. Komiyama",

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T1 - Study on increasing the coercivity of CoCrPtB media with high Pt content

AU - Mikami, M.

AU - Djayaprawira, D. D.

AU - Domon, H.

AU - Yoshimura, S.

AU - Takahashi, Migaku

AU - Komiyama, K.

PY - 2002/5/15

Y1 - 2002/5/15

N2 - The dependence of magnetic properties and microstructure on the composition of CrMo x (x=0-40at.%) underlayer and CoCr-based nonmagnetic interlayer has been examined for CoCr 18Pt 20B 4 longitudinal media. In the media using a single CrMo (10 nm) underlayer, the highest coercivity that can be obtained is only 1.9 kOe. The coercivity is drastically increased up to 5.0 and 6.4 kOe by using substrate/Cr (5 nm)/CrMo (5 nm) dual underlayer and substrate/CrMo (10nm)/CoCr 38Mo 2 (1.3 nm), respectively. It is clarified that the improvement of the coercivity is mainly due to the enhancement of the quality of the crystal growth of the magnetic layer, which results in the improvement of magnetocrystalline anisotropy field and in-plane crystallographic orientation.

AB - The dependence of magnetic properties and microstructure on the composition of CrMo x (x=0-40at.%) underlayer and CoCr-based nonmagnetic interlayer has been examined for CoCr 18Pt 20B 4 longitudinal media. In the media using a single CrMo (10 nm) underlayer, the highest coercivity that can be obtained is only 1.9 kOe. The coercivity is drastically increased up to 5.0 and 6.4 kOe by using substrate/Cr (5 nm)/CrMo (5 nm) dual underlayer and substrate/CrMo (10nm)/CoCr 38Mo 2 (1.3 nm), respectively. It is clarified that the improvement of the coercivity is mainly due to the enhancement of the quality of the crystal growth of the magnetic layer, which results in the improvement of magnetocrystalline anisotropy field and in-plane crystallographic orientation.

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