采用微磁有限元方法,分析了粒径分布对垂直磁记录介质中过渡区噪声性能的影响.计算结果表明,颗粒间相互相互耦合作用可以增加介质的矫顽力和剩磁矩形比,使过渡区宽度有稍许减小,同时也使垂直于记录轨道方向的关联长度有一定增加.结果还表明,粒径为Voronoi分布的介质的过渡区噪声高于粒径为一致分布的介质,且随着颗粒间相互交换耦合作用增加和记录密度的提高,噪声的差值也会变大.因此,可以通过采用粒径具有一定分布的介质来减弱颗粒间相互交换耦合作用和记录密度对介质过渡区噪声的影响.
参考文献
| [1] | Iwasaki S .[J].IEEE Transactions on Magnetics,1980,16(01):71-76. |
| [2] | Iwasaki S .[J].Journal of Magnetism and Magnetic Materials,2001,235:227-234. |
| [3] | Zhou H .Micromagnetic Analyses of Effects of Intergranular Magetostatic and Exchange Interactions on Signal-to-noise and Thermal Stability in Hard Disk Drive Recording Media[D].San Diego:University of California,2001. |
| [4] | Bertram H.N.;Zhou H. .Signal to noise ratio scaling and density limit estimates in longitudinal magnetic recording[J].IEEE Transactions on Magnetics,1998(4):1845-1847. |
| [5] | Slutsky B.;Bertram H.N. .Transition noise analysis of thin film magnetic recording media[J].IEEE Transactions on Magnetics,1994(5):2808-2817. |
| [6] | Edward T. Yen;Stella Z. Wu;Thomas Thomson;Roger Ristau;Rajiv Ranjan;Gary C. Rauch;Claus Habermeier;Robert Sinclair .Case study of media noise mechanisms in longitudinal recording[J].IEEE Transactions on Magnetics,1999(5):2730-2732. |
| [7] | Hong Zhou;H. Neal Bertram .Effect of Grain Size Distribution on Recording Performance in Longitudinal Thin Film Media[J].IEEE Transactions on Magnetics,2000(1):61-66. |
| [8] | Brown W F.Micromagnetics[M].New York:wiley,1963:47-59. |
| [9] | Gilbert T L .[J].Physical Review,1955,100:1243. |
| [10] | Scholz W;Fidler J;Schrefl T .[J].Computational Materials Science,2003,28:366-383. |
| [11] | Zhu J G .Interactive Phenomena in Magnetic Thin Films[D].San Diego:University of California,1989. |
| [12] | Liu Z J;Long H H;Ye W C et al.[J].Journal of Magnetism and Magnetic Materials,2006,303:148-151. |
| [13] | Bertram H.N.;Zhou H. .Signal to noise ratio scaling and density limit estimates in longitudinal magnetic recording[J].IEEE Transactions on Magnetics,1998(4):1845-1847. |
| [14] | Bertram H.N.;Williams M. .SNR and density limit estimates: a comparison of longitudinal and perpendicular recording[J].IEEE Transactions on Magnetics,2000(1):4-9. |
| [15] | Bertram H N.Theory of Magnetic Recording[M].Cambridge:Cambridge University Press,1994:204-244. |
| [16] | Zhen Jin;Xiaobin Wang;H. Neal Bertram .An Analytical Model for the Cross-Track Correlation Length Including Inter-Granular Interactions[J].IEEE Transactions on Magnetics,2003(5):2603-2605. |
| [17] | Micromagnetic Study of the Transition Parameter and Position Jitter in Perpendicular Recording[J].IEEE Transactions on Magnetics,2003(3):1846-1850. |
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