Noise from underlayer of perpendicular magnetic recording medium

Y. Uesaka; M. Koizumi; N. Tsumita; O. Kitakami; H. Fujiwara

doi:10.1063/1.334918

Noise from underlayer of perpendicular magnetic recording medium

Y. Uesaka, M. Koizumi, N. Tsumita, O. Kitakami, H. Fujiwara

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12 Citations (Scopus)

Abstract

Noise from the underlayer is observed with a Mn-Zn ferrite head and a Co-Mo-Zr low coercivity amorphous underlayer. Three kinds of noise are observed, spike noise (s), medium noise (m), and low noise (l). s noise is generated through the domain walls of an underlayer. m noise originates from the interaction between an underlayer and the reproducing head's residual magnetization. Three effective methods are tested for reducing the noise: (1) increase of coercivity of an underlayer, (2) use of an ac-erased head, and (3) use of a thin-film head.

Original language	English
Pages (from-to)	3925-3927
Number of pages	3
Journal	Journal of Applied Physics
Volume	57
Issue number	8
DOIs	https://doi.org/10.1063/1.334918
Publication status	Published - 1985
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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T1 - Noise from underlayer of perpendicular magnetic recording medium

AU - Uesaka, Y.

AU - Koizumi, M.

AU - Tsumita, N.

AU - Kitakami, O.

AU - Fujiwara, H.

PY - 1985

Y1 - 1985

N2 - Noise from the underlayer is observed with a Mn-Zn ferrite head and a Co-Mo-Zr low coercivity amorphous underlayer. Three kinds of noise are observed, spike noise (s), medium noise (m), and low noise (l). s noise is generated through the domain walls of an underlayer. m noise originates from the interaction between an underlayer and the reproducing head's residual magnetization. Three effective methods are tested for reducing the noise: (1) increase of coercivity of an underlayer, (2) use of an ac-erased head, and (3) use of a thin-film head.

AB - Noise from the underlayer is observed with a Mn-Zn ferrite head and a Co-Mo-Zr low coercivity amorphous underlayer. Three kinds of noise are observed, spike noise (s), medium noise (m), and low noise (l). s noise is generated through the domain walls of an underlayer. m noise originates from the interaction between an underlayer and the reproducing head's residual magnetization. Three effective methods are tested for reducing the noise: (1) increase of coercivity of an underlayer, (2) use of an ac-erased head, and (3) use of a thin-film head.

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JO - Journal of Applied Physics

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Noise from underlayer of perpendicular magnetic recording medium

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