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Media and tip trajectory optimization for high-density MFM-based perpendicular recording

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

In this paper, we investigate the feasibility of using a magnetic force microscopy scheme for recording and retrieving magnetic marks for ultrahigh-density, ultralow power applications. We will address the main design considerations while designing such a system. Then, using the impulse-response and inverse-convolution technique, we deduce a novel tip trajectory for the optimum recording process. We will also apply extensive optimization for a CoxCryPt1-x-y perpendicular media structure to maximize the signal-to-noise ratio (SNR). An areal density of up to 0.3 Tb/in2 is shown to be achievable with thermally stable magnetic marks and a SNR of 20-25 dB in the existence of additional electronic noise.

Published in:

Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 3 )

Date of Publication:

March 2005

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