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• W2054931623 abstract "The fundamental limit of magnetic recording density on conventional media is set by the grain size. Once this grain size limit is reached, only a reduction of the grain size allows an increased SNR and thus an increased areal density. It is shown that, whilst maintaining thermal stability, scaling demands that the required anisotropy energy density K is proportional to the areal density, or the square of the areal density if the medium thickness reaches the critical thickness 4A/K (A is the exchange stiffness of the material). Recording onto materials with such a high anisotropy requires some form of a write-assist. It is furthermore shown that the grain size limit cannot be obtained with intergranular exchange present, and six different requirements are listed that constitute ideal media. An alternative path for increasing areal density of magnetic recording is to use patterned media, where each bit contains only one grain. In this case, written-in errors dominate system performance and the maximum achievable areal density is estimated to be about 6 Tbit/in2. Patterned media need to exhibit narrow distributions of their physical and structural properties with standard deviations of the order of 5% or less." @default.
• W2054931623 created "2016-06-24" @default.
• W2054931623 creator A5000094194 @default.
• W2054931623 date "2009-03-01" @default.
• W2054931623 modified "2023-09-25" @default.
• W2054931623 title "Density limits imposed by the microstructure of magnetic recording media" @default.
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• W2054931623 doi "https://doi.org/10.1016/j.jmmm.2008.04.161" @default.
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