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Performance analysis of beyond 100 Gb/in2 MFM-based MEMS-actuated mass storage devices

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2 Author(s)
R. T. El-Sayed ; Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA ; L. R. Carley

This paper presents an initial performance analysis of microelectromechanical systems (MEMS)-actuated mass storage devices that employ a magnetic force microscopy (MFM)-based approach for writing and reading. Extensive micromagnetic modeling and simulations have been performed to optimize both the tip dimensions and read/write flying heights in terms of signal-to-noise ratio, inter-track interference (ITI), and thermal decay rate. Using a commercial, single-layered 14-nm grain diameter Co-based granular media, this initial optimization process indicates the possibility of achieving a track pitch of 59 nm and a bit length (with conservative RL coding) of 100 nm (i.e., areal density of 105 Gb/in2). The resulting SNR is 13.1 dB (RMS signal/RMS noise) with -3 dB/10 year thermal decay rate.

Published in:

IEEE Transactions on Magnetics  (Volume:38 ,  Issue: 5 )