Composite Media for Heat Assisted Magnetic Recording

Simon John Greaves; Yoshiaki Sonobe; Hiroaki Muraoka

doi:10.1109/TMAG.2017.2696561

Composite Media for Heat Assisted Magnetic Recording

Simon John Greaves^*, Yoshiaki Sonobe, Hiroaki Muraoka

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Composite media grains consisting of two discrete magnetic layers with different uniaxial anisotropies, K_u, and Curie temperatures, T_c , were investigated for heat assisted magnetic recording. The maximum switching probability of optimized composite grains exceeded that of single phase grains. As K_u of one layer increased the optimum K_u of the other layer became smaller, tending toward zero in many cases. Leading and trailing edge recording were also compared. Trailing edge recording was superior when the maximum temperature in the grain, T_max , was similar to T_c , but when T_max exceeded T_c leading edge recording performed better.

Original language	English
Article number	7907259
Journal	IEEE Transactions on Magnetics
Volume	53
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2017.2696561
Publication status	Published - 2017 Nov
Externally published	Yes

Keywords

Composite media
heat assisted magnetic recording (HAMR)
simulation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2017.2696561

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title = "Composite Media for Heat Assisted Magnetic Recording",

abstract = "Composite media grains consisting of two discrete magnetic layers with different uniaxial anisotropies, Ku, and Curie temperatures, Tc , were investigated for heat assisted magnetic recording. The maximum switching probability of optimized composite grains exceeded that of single phase grains. As Ku of one layer increased the optimum Ku of the other layer became smaller, tending toward zero in many cases. Leading and trailing edge recording were also compared. Trailing edge recording was superior when the maximum temperature in the grain, Tmax , was similar to Tc , but when Tmax exceeded Tc leading edge recording performed better.",

keywords = "Composite media, heat assisted magnetic recording (HAMR), simulation",

author = "Greaves, {Simon John} and Yoshiaki Sonobe and Hiroaki Muraoka",

note = "Publisher Copyright: {\textcopyright} 1965-2012 IEEE.",

year = "2017",

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doi = "10.1109/TMAG.2017.2696561",

language = "English",

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AB - Composite media grains consisting of two discrete magnetic layers with different uniaxial anisotropies, Ku, and Curie temperatures, Tc , were investigated for heat assisted magnetic recording. The maximum switching probability of optimized composite grains exceeded that of single phase grains. As Ku of one layer increased the optimum Ku of the other layer became smaller, tending toward zero in many cases. Leading and trailing edge recording were also compared. Trailing edge recording was superior when the maximum temperature in the grain, Tmax , was similar to Tc , but when Tmax exceeded Tc leading edge recording performed better.

KW - Composite media

KW - heat assisted magnetic recording (HAMR)

KW - simulation

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Composite Media for Heat Assisted Magnetic Recording

Abstract

Keywords

ASJC Scopus subject areas

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