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C. Vogler, C. Abert, F. Bruckner, D. Süss, D. Praetorius:
"Heat-assisted magnetic recording of bit-patterned media beyond 10 Tb/in²";
Applied Physics Letters, 108 (2016), 102406-1 - 102406-4.

The limits of areal storage density that is achievable with heat-assisted magnetic recording are unknown. We addressed this central question and investigated the areal density of bit-patterned media. We analyzed the detailed switching behavior of a recording bit under various external conditions, allowing us to compute the bit error rate of a write process (shingled and conventional) for various grain spacings, write head positions, and write temperatures. Hence, we were able to optimize the areal density yielding values beyond 10 Tb/in². Our model is based on the Landau-Lifshitz-Bloch equation and uses hard magnetic recording grains with a 5-nm diameter and 10-nm height. It assumes a realistic distribution of the Curie temperature of the underlying material, grain size, as well as grain and head position.

heat-assisted magnetic recording, Landau-Lifshitz-Bloch, shingled writing, bit-patterned media, bit error rate

http://dx.doi.org/10.1063/1.4943629