Thermal stability and SNR of coupled granular/continuous media
Thermal stability and SNR of coupled granular/continuous media
复制标题
耦合颗粒/连续介质的热稳定性和信噪比
DOI：
10.1109/20.950932
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发表时间：
2001
影响因子：
2.1
通讯作者：
Y. Nakamura
中科院分区：
文献类型：
--
作者：
Y. Sonobe;D. Weller;Y. Ikeda;M. Schabes;K. Takano;G. Zeltzer;B. Yen;M. Best;S. Greaves;H. Muraoka;Y. Nakamura
我们研究了耦合的颗粒/连续（CGC）垂直介质，它由用于高热稳定性的连续多层和一个颗粒主层组成以降低噪声。Co/Pt多层的添加使CoCr₁₈Pt₁₂介质的成核场从0增加到 -2000奥斯特。此外，每十倍频程的磁矩衰减从4.8%降低到0.1%。与Co/Pd多层介质相比，CGC介质的信噪比（SNR）高10分贝。颗粒主层在高于10 kfc/mm的高密度区域显著提高了信噪比。与CoCr₂₀Pt₁₀介质相比，CGC介质在低密度区域的信噪比高3分贝。CGC介质的介质噪声随记录密度增加，而CoCr₂₀Pt₁₀介质的噪声在10到20 kfc/mm范围内保持恒定。使用CGC介质的方法提高了信噪比和热稳定性。
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.