Time-Dependence Effect in Alumite Recording Media with Perpendicular Anisotropy

Phan Le KIM; Cock LODDER

Time-Dependence Effect in Alumite Recording Media with Perpendicular Anisotropy

Phan Le KIM, Cock LODDER

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In this paper, we will present a study of the time-dependence effect in alumite perpendicular media at different thicknesses. Important parameters of the time-dependence effect such as magnetic viscosity and activation volume are investigated. Viscosity as a function of applied field (viscosity curve) exhibits a short plateau at a low field and then decreases monotonously with increasing field. After correcting for the demagnetizing field, the shape of the intrinsic viscosity curves changes to the well-known shape of the viscosity curve of in-plane media, i. e. , they have a peak near H_c. The intrinsic viscosity curves obtained from the experiments were fitted to an analytical model by Chantrell et al., from which, we found that the effective switching volumes obtained by fitting are much smaller than the column volumes, indicating that the reversal mechanism is incoherent.

Publication: IEICE TRANSACTIONS on Electronics Vol.E82-C No.12 pp.2176-2183

Publication Date: 1999/12/25

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Type of Manuscript: Special Section PAPER (Special Issue on Information Storage Technologies for the 21st Century)

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Phan Le KIM, Cock LODDER, "Time-Dependence Effect in Alumite Recording Media with Perpendicular Anisotropy" in IEICE TRANSACTIONS on Electronics, vol. E82-C, no. 12, pp. 2176-2183, December 1999, doi: .
Abstract: In this paper, we will present a study of the time-dependence effect in alumite perpendicular media at different thicknesses. Important parameters of the time-dependence effect such as magnetic viscosity and activation volume are investigated. Viscosity as a function of applied field (viscosity curve) exhibits a short plateau at a low field and then decreases monotonously with increasing field. After correcting for the demagnetizing field, the shape of the intrinsic viscosity curves changes to the well-known shape of the viscosity curve of in-plane media, i. e. , they have a peak near H_c. The intrinsic viscosity curves obtained from the experiments were fitted to an analytical model by Chantrell et al., from which, we found that the effective switching volumes obtained by fitting are much smaller than the column volumes, indicating that the reversal mechanism is incoherent.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e82-c_12_2176/_p

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@ARTICLE{e82-c_12_2176,
author={Phan Le KIM, Cock LODDER, },
journal={IEICE TRANSACTIONS on Electronics},
title={Time-Dependence Effect in Alumite Recording Media with Perpendicular Anisotropy},
year={1999},
volume={E82-C},
number={12},
pages={2176-2183},
abstract={In this paper, we will present a study of the time-dependence effect in alumite perpendicular media at different thicknesses. Important parameters of the time-dependence effect such as magnetic viscosity and activation volume are investigated. Viscosity as a function of applied field (viscosity curve) exhibits a short plateau at a low field and then decreases monotonously with increasing field. After correcting for the demagnetizing field, the shape of the intrinsic viscosity curves changes to the well-known shape of the viscosity curve of in-plane media, i. e. , they have a peak near H_c. The intrinsic viscosity curves obtained from the experiments were fitted to an analytical model by Chantrell et al., from which, we found that the effective switching volumes obtained by fitting are much smaller than the column volumes, indicating that the reversal mechanism is incoherent.},
keywords={},
doi={},
ISSN={},
month={December},}

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TY - JOUR
TI - Time-Dependence Effect in Alumite Recording Media with Perpendicular Anisotropy
T2 - IEICE TRANSACTIONS on Electronics
SP - 2176
EP - 2183
AU - Phan Le KIM
AU - Cock LODDER
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E82-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 1999
AB - In this paper, we will present a study of the time-dependence effect in alumite perpendicular media at different thicknesses. Important parameters of the time-dependence effect such as magnetic viscosity and activation volume are investigated. Viscosity as a function of applied field (viscosity curve) exhibits a short plateau at a low field and then decreases monotonously with increasing field. After correcting for the demagnetizing field, the shape of the intrinsic viscosity curves changes to the well-known shape of the viscosity curve of in-plane media, i. e. , they have a peak near H_c. The intrinsic viscosity curves obtained from the experiments were fitted to an analytical model by Chantrell et al., from which, we found that the effective switching volumes obtained by fitting are much smaller than the column volumes, indicating that the reversal mechanism is incoherent.
ER -