Thermal Stability Study for Anisotropic and Isotropic Hard Disk Media
Summary :
Thermal stability of anisotropic and isotropic Co alloy thin-film media is investigated. The orientation ratio of CoCrTa(Pt)/Cr media was controlled by the mechanical texture of the NiP/Al substrates. Bulk magnetic properties, delta M curves and time decay of magnetization in the circumferential and radial directions were measured. The maximum magnetic viscosity coefficient calculated from the time decay of magnetization in the circumferential direction was higher than that in the radial direction for a mechanically textured sample, while it was similar in both directions for a non-textured sample. The magnetic viscosity coefficient in the circumferential direction is smaller than that in the radial direction when the reverse field is in the range of the demagnetization field for thin-film recording media. This implies that an anisotropic sample (namely, a sample with a high orientation ratio) will be more thermally stable when it is not exposed to a large external magnetic field.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E82-C No.12 pp.2171-2175
- Publication Date
- 1999/12/25
- Publicized
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- Type of Manuscript
- Special Section PAPER (Special Issue on Information Storage Technologies for the 21st Century)
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Lea Peng TAN, Jian Ping WANG, "Thermal Stability Study for Anisotropic and Isotropic Hard Disk Media" in IEICE TRANSACTIONS on Electronics,
vol. E82-C, no. 12, pp. 2171-2175, December 1999, doi: .
Abstract: Thermal stability of anisotropic and isotropic Co alloy thin-film media is investigated. The orientation ratio of CoCrTa(Pt)/Cr media was controlled by the mechanical texture of the NiP/Al substrates. Bulk magnetic properties, delta M curves and time decay of magnetization in the circumferential and radial directions were measured. The maximum magnetic viscosity coefficient calculated from the time decay of magnetization in the circumferential direction was higher than that in the radial direction for a mechanically textured sample, while it was similar in both directions for a non-textured sample. The magnetic viscosity coefficient in the circumferential direction is smaller than that in the radial direction when the reverse field is in the range of the demagnetization field for thin-film recording media. This implies that an anisotropic sample (namely, a sample with a high orientation ratio) will be more thermally stable when it is not exposed to a large external magnetic field.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e82-c_12_2171/_p
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@ARTICLE{e82-c_12_2171,
author={Lea Peng TAN, Jian Ping WANG, },
journal={IEICE TRANSACTIONS on Electronics},
title={Thermal Stability Study for Anisotropic and Isotropic Hard Disk Media},
year={1999},
volume={E82-C},
number={12},
pages={2171-2175},
abstract={Thermal stability of anisotropic and isotropic Co alloy thin-film media is investigated. The orientation ratio of CoCrTa(Pt)/Cr media was controlled by the mechanical texture of the NiP/Al substrates. Bulk magnetic properties, delta M curves and time decay of magnetization in the circumferential and radial directions were measured. The maximum magnetic viscosity coefficient calculated from the time decay of magnetization in the circumferential direction was higher than that in the radial direction for a mechanically textured sample, while it was similar in both directions for a non-textured sample. The magnetic viscosity coefficient in the circumferential direction is smaller than that in the radial direction when the reverse field is in the range of the demagnetization field for thin-film recording media. This implies that an anisotropic sample (namely, a sample with a high orientation ratio) will be more thermally stable when it is not exposed to a large external magnetic field.},
keywords={},
doi={},
ISSN={},
month={December},}
Copy
TY - JOUR
TI - Thermal Stability Study for Anisotropic and Isotropic Hard Disk Media
T2 - IEICE TRANSACTIONS on Electronics
SP - 2171
EP - 2175
AU - Lea Peng TAN
AU - Jian Ping WANG
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E82-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 1999
AB - Thermal stability of anisotropic and isotropic Co alloy thin-film media is investigated. The orientation ratio of CoCrTa(Pt)/Cr media was controlled by the mechanical texture of the NiP/Al substrates. Bulk magnetic properties, delta M curves and time decay of magnetization in the circumferential and radial directions were measured. The maximum magnetic viscosity coefficient calculated from the time decay of magnetization in the circumferential direction was higher than that in the radial direction for a mechanically textured sample, while it was similar in both directions for a non-textured sample. The magnetic viscosity coefficient in the circumferential direction is smaller than that in the radial direction when the reverse field is in the range of the demagnetization field for thin-film recording media. This implies that an anisotropic sample (namely, a sample with a high orientation ratio) will be more thermally stable when it is not exposed to a large external magnetic field.
ER -
English
