Magnetic and recording properties of (CoCrPt)1-x (SiO 2)x media

J. D. Dutson; M. Hashimoto; Y. Inaba; S. J. Greaves; H. Muraoka; K. O'Grady

doi:10.1109/TMAG.2006.888437

Magnetic and recording properties of (CoCrPt)_1-x (SiO ₂)_x media

J. D. Dutson, M. Hashimoto, Y. Inaba, S. J. Greaves, H. Muraoka, K. O'Grady

Broadband Engineering Division

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

5 Citations (Scopus)

Abstract

In this work, we report on the determination of the optimum level of SiO₂ in (CoCrPt)_1-x (SiO₂)_x perpendicular recording media. We have determined the optimum level via studies of magnetic viscosity which have been compared to recording properties. We find that the optimum level of SiO₂ is of the order of 10%. At this level, studies of the activation volume of reversal show that the grains become essentially exchange decoupled and that a further increase in the level of SiO₂ produces no further improvement in the decoupling. We also find that this level of SiO₂ corresponds to optimum recording performance and that increasing the level of SiO₂ further results in the production of a system with smaller grains where thermal loss is observed to increase dramatically.

Original language	English
Pages (from-to)	814-818
Number of pages	5
Journal	IEEE Transactions on Magnetics
Volume	43
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2006.888437
Publication status	Published - 2007 Feb

Keywords

Activation volume
Intergranular coupling
Magnetic characterization
Perpendicular recording media

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2006.888437

Cite this

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title = "Magnetic and recording properties of (CoCrPt)1-x (SiO 2)x media",

abstract = "In this work, we report on the determination of the optimum level of SiO2 in (CoCrPt)1-x (SiO2)x perpendicular recording media. We have determined the optimum level via studies of magnetic viscosity which have been compared to recording properties. We find that the optimum level of SiO2 is of the order of 10%. At this level, studies of the activation volume of reversal show that the grains become essentially exchange decoupled and that a further increase in the level of SiO2 produces no further improvement in the decoupling. We also find that this level of SiO2 corresponds to optimum recording performance and that increasing the level of SiO2 further results in the production of a system with smaller grains where thermal loss is observed to increase dramatically.",

keywords = "Activation volume, Intergranular coupling, Magnetic characterization, Perpendicular recording media",

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T1 - Magnetic and recording properties of (CoCrPt)1-x (SiO 2)x media

AU - Dutson, J. D.

AU - Hashimoto, M.

AU - Inaba, Y.

AU - Greaves, S. J.

AU - Muraoka, H.

AU - O'Grady, K.

PY - 2007/2

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N2 - In this work, we report on the determination of the optimum level of SiO2 in (CoCrPt)1-x (SiO2)x perpendicular recording media. We have determined the optimum level via studies of magnetic viscosity which have been compared to recording properties. We find that the optimum level of SiO2 is of the order of 10%. At this level, studies of the activation volume of reversal show that the grains become essentially exchange decoupled and that a further increase in the level of SiO2 produces no further improvement in the decoupling. We also find that this level of SiO2 corresponds to optimum recording performance and that increasing the level of SiO2 further results in the production of a system with smaller grains where thermal loss is observed to increase dramatically.

AB - In this work, we report on the determination of the optimum level of SiO2 in (CoCrPt)1-x (SiO2)x perpendicular recording media. We have determined the optimum level via studies of magnetic viscosity which have been compared to recording properties. We find that the optimum level of SiO2 is of the order of 10%. At this level, studies of the activation volume of reversal show that the grains become essentially exchange decoupled and that a further increase in the level of SiO2 produces no further improvement in the decoupling. We also find that this level of SiO2 corresponds to optimum recording performance and that increasing the level of SiO2 further results in the production of a system with smaller grains where thermal loss is observed to increase dramatically.

KW - Activation volume

KW - Intergranular coupling

KW - Magnetic characterization

KW - Perpendicular recording media

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