Reversal behaviour in perpendicular iron particle arrays (alumite media)

J.C. Lodder; Li Cheng-Zhang

doi:10.1109/20.42558

Reversal behaviour in perpendicular iron particle arrays (alumite media)

J.C. Lodder, Li Cheng-Zhang

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Abstract

Alumite was chosen as an ideal material to investigate the influence of particle interaction on the magnetic behaviour of a perpendicular anisotropic particle array. It was found that the measured reduced coercivity versus the reduced diameter curves fits the theoretical curling mode. However, the magnetic behaviour will no longer obey curling if the applied field deviates from the film normal. This is due to the presence of magnetic charge next to iron singel-domain cylinders, which completely destroys the validity for curling. Their reversal can be interpreted from the superposition of Cos-type incoherent rotation and the magnetization reversal switched by the demagnetizing field and the dipole-dipole field

Original language	English
Pages (from-to)	4171-4173
Number of pages	3
Journal	IEEE transactions on magnetics
Volume	25
Issue number	5
DOIs	https://doi.org/10.1109/20.42558
Publication status	Published - 1989

Keywords

SMI-TST: From 2006 in EWI-TST
SMI-MAT: MATERIALS

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abstract = "Alumite was chosen as an ideal material to investigate the influence of particle interaction on the magnetic behaviour of a perpendicular anisotropic particle array. It was found that the measured reduced coercivity versus the reduced diameter curves fits the theoretical curling mode. However, the magnetic behaviour will no longer obey curling if the applied field deviates from the film normal. This is due to the presence of magnetic charge next to iron singel-domain cylinders, which completely destroys the validity for curling. Their reversal can be interpreted from the superposition of Cos-type incoherent rotation and the magnetization reversal switched by the demagnetizing field and the dipole-dipole field",

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AU - Lodder, J.C.

AU - Cheng-Zhang, Li

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AB - Alumite was chosen as an ideal material to investigate the influence of particle interaction on the magnetic behaviour of a perpendicular anisotropic particle array. It was found that the measured reduced coercivity versus the reduced diameter curves fits the theoretical curling mode. However, the magnetic behaviour will no longer obey curling if the applied field deviates from the film normal. This is due to the presence of magnetic charge next to iron singel-domain cylinders, which completely destroys the validity for curling. Their reversal can be interpreted from the superposition of Cos-type incoherent rotation and the magnetization reversal switched by the demagnetizing field and the dipole-dipole field

KW - SMI-TST: From 2006 in EWI-TST

KW - SMI-MAT: MATERIALS

U2 - 10.1109/20.42558

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JO - IEEE transactions on magnetics

JF - IEEE transactions on magnetics

SN - 0018-9464

IS - 5

ER -

Reversal behaviour in perpendicular iron particle arrays (alumite media)

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