Thermal stability and SNR of coupled granular/continuous media

Y. Sonobe; D. Weller; Y. Ikeda; M. Schabes; K. Takano; G. Zeltzer; B. K. Yen; M. E. Best; S. J. Greaves; H. Muraoka; Y. Nakamura

doi:10.1109/20.950932

Thermal stability and SNR of coupled granular/continuous media

Y. Sonobe^*, D. Weller, Y. Ikeda, M. Schabes, K. Takano, G. Zeltzer, B. K. Yen, M. E. Best, S. J. Greaves, H. Muraoka, Y. Nakamura

^*この研究の対応する著者

研究成果: Conference article › 査読

41 被引用数 (Scopus)

抄録

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 CoCr₁₈Pt₁₂ 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 CoCr₂₀Pt₁₀ 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 CoCr₂₀Pt₁₀ medium remained constant from 10 to 20 kfc/mm. The approach using CGC medium improves both the SNR and the thermal stability.

本文言語	English
ページ（範囲）	1667-1670
ページ数	4
ジャーナル	IEEE Transactions on Magnetics
巻	37
号	4 I
DOI	https://doi.org/10.1109/20.950932
出版ステータス	Published - 2001 7月
外部発表	はい
イベント	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States 継続期間: 2001 1月 7 → 2001 1月 11

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
電子工学および電気工学

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@article{4551a8704343424a865a9435b4b9fe20,

title = "Thermal stability and SNR of coupled granular/continuous media",

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 CoCr18Pt12 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 CoCr20Pt10 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 CoCr20Pt10 medium remained constant from 10 to 20 kfc/mm. The approach using CGC medium improves both the SNR and the thermal stability.",

keywords = "Continuous layer, Granular layer, Perpendicular media, Signal-to-noise ratio, Thermal stability",

author = "Y. Sonobe and D. Weller and Y. Ikeda and M. Schabes and K. Takano and G. Zeltzer and Yen, {B. K.} and Best, {M. E.} and Greaves, {S. J.} and H. Muraoka and Y. Nakamura",

year = "2001",

month = jul,

doi = "10.1109/20.950932",

language = "English",

volume = "37",

pages = "1667--1670",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "4 I",

note = "8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

}

TY - JOUR

T1 - Thermal stability and SNR of coupled granular/continuous media

AU - Sonobe, Y.

AU - Weller, D.

AU - Ikeda, Y.

AU - Schabes, M.

AU - Takano, K.

AU - Zeltzer, G.

AU - Yen, B. K.

AU - Best, M. E.

AU - Greaves, S. J.

AU - Muraoka, H.

AU - Nakamura, Y.

PY - 2001/7

Y1 - 2001/7

N2 - 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 CoCr18Pt12 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 CoCr20Pt10 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 CoCr20Pt10 medium remained constant from 10 to 20 kfc/mm. The approach using CGC medium improves both the SNR and the thermal stability.

AB - 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 CoCr18Pt12 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 CoCr20Pt10 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 CoCr20Pt10 medium remained constant from 10 to 20 kfc/mm. The approach using CGC medium improves both the SNR and the thermal stability.

KW - Continuous layer

KW - Granular layer

KW - Perpendicular media

KW - Signal-to-noise ratio

KW - Thermal stability

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U2 - 10.1109/20.950932

DO - 10.1109/20.950932

M3 - Conference article

AN - SCOPUS:0035386552

SN - 0018-9464

VL - 37

SP - 1667

EP - 1670

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 4 I

T2 - 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag)

Y2 - 7 January 2001 through 11 January 2001

ER -

Thermal stability and SNR of coupled granular/continuous media

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