Micromagnetics of Hysteresis Loops in CGC Perpendicular Media

A. M. Goodman; S. J. Greaves; H. Muraoka; K. Miura; Y. Sonobe; Y. Nakamura

doi:10.1109/TMAG.2003.816287

Micromagnetics of Hysteresis Loops in CGC Perpendicular Media

A. M. Goodman^*, S. J. Greaves, H. Muraoka, K. Miura, Y. Sonobe, Y. Nakamura

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

Magnetization reversal mechanisms in coupled granular/continuous perpendicular media are investigated using a three-dimensional micromagnetic model. Hysteresis loops for media with reduced exchange coupling between the continuous and granular layers are found to reverse via a three-stage reversal process. Reversal within soft grains in the granular layer is found to reduce the nucleation field by destabilizing the continuous layer, while hard grains that do not reverse when the continuous layer switches determine the saturation field H_s.

Original language	English
Pages (from-to)	2329-2331
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	39
Issue number	5 II
DOIs	https://doi.org/10.1109/TMAG.2003.816287
Publication status	Published - 2003 Sept
Externally published	Yes

Keywords

Coupled continuous/granular (CGC) media
Exchange coupling
Micromagnetic simulation
Perpendicular magnetic recording

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2003.816287

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abstract = "Magnetization reversal mechanisms in coupled granular/continuous perpendicular media are investigated using a three-dimensional micromagnetic model. Hysteresis loops for media with reduced exchange coupling between the continuous and granular layers are found to reverse via a three-stage reversal process. Reversal within soft grains in the granular layer is found to reduce the nucleation field by destabilizing the continuous layer, while hard grains that do not reverse when the continuous layer switches determine the saturation field Hs.",

keywords = "Coupled continuous/granular (CGC) media, Exchange coupling, Micromagnetic simulation, Perpendicular magnetic recording",

author = "Goodman, {A. M.} and Greaves, {S. J.} and H. Muraoka and K. Miura and Y. Sonobe and Y. Nakamura",

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volume = "39",

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AU - Goodman, A. M.

AU - Greaves, S. J.

AU - Muraoka, H.

AU - Miura, K.

AU - Sonobe, Y.

AU - Nakamura, Y.

PY - 2003/9

Y1 - 2003/9

N2 - Magnetization reversal mechanisms in coupled granular/continuous perpendicular media are investigated using a three-dimensional micromagnetic model. Hysteresis loops for media with reduced exchange coupling between the continuous and granular layers are found to reverse via a three-stage reversal process. Reversal within soft grains in the granular layer is found to reduce the nucleation field by destabilizing the continuous layer, while hard grains that do not reverse when the continuous layer switches determine the saturation field Hs.

AB - Magnetization reversal mechanisms in coupled granular/continuous perpendicular media are investigated using a three-dimensional micromagnetic model. Hysteresis loops for media with reduced exchange coupling between the continuous and granular layers are found to reverse via a three-stage reversal process. Reversal within soft grains in the granular layer is found to reduce the nucleation field by destabilizing the continuous layer, while hard grains that do not reverse when the continuous layer switches determine the saturation field Hs.

KW - Coupled continuous/granular (CGC) media

KW - Exchange coupling

KW - Micromagnetic simulation

KW - Perpendicular magnetic recording

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 5 II

ER -

Micromagnetics of Hysteresis Loops in CGC Perpendicular Media

Abstract

Keywords

ASJC Scopus subject areas

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