NDLI: Thermal stability and SNR of coupled granular/continuous media

Content Provider	IEEE Xplore Digital Library
Author	Sonobe, Y. Weller, D. Ikeda, Y. Schabes, M. Takano, K. Zeltzer, G. Yen, B.K. Best, M.E. Greaves, S.J. Muraoka, H. Nakamura, Y.
Copyright Year	1965
Abstract	We investigated coupled granular/continuous (CGC) perpendicular media consisting of a continuous multilayer for high thermal stability and a granular host layer to reduce noise. The addition of Co/Pt multilayers increased the nucleation field of the CoCr/sub 18/Pt/sub 12/ medium from 0 to -2000 Oe. Moreover, the moment decay was reduced from 4.8% to 0.1% per decade. Compared to Co/Pd multilayer media, the CGC medium had a 10 dB higher signal-to-noise ratio (SNR). The granular host layer significantly improved the SNR in the high-density region over 10 kfc/mm. Compared to the CoCr/sub 20/Pt/sub 10/ medium, the CGC medium had a 3 dB higher SNR in the low-density region. The medium noise for the CGC medium increased with the recording density, while the noise for the CoCr/sub 20/Pt/sub 10/ medium remained constant from 10 to 20 kfc/mm. The approach using CGC medium improves both the SNR and the thermal stability.
Sponsorship	IEEE Magnetics Society
Starting Page	1667
Ending Page	1670
Page Count	4
File Size	75101
File Format	PDF
ISSN	00189464
Volume Number	37
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal stability Signal to noise ratio Nonhomogeneous media Magnetic noise Noise reduction Anisotropic magnetoresistance Magnetic heads Magnetization Coercive force Magnetic multilayers
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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