MULTILEVEL AND THREEDIMENSIONAL NANOMAGNETIC RECORDING - Bio-Inspired and Nanoscale Integrated Computing - page 198

between any two adjacent levels. The proposed data encoding methods are aimed
at providing sufficient bit error rates for a system with a SNR of the order of 5 dB.
ACKNOWLEDGMENTS
The authors would like to aknowledge the insighful discussions with Dr. Michael
Alex of Hitachi Research and the continous support by the research groups led by
Song Xue of Seagate Technology, Steve Lambert of Hitachi Global Storage
Technologies, and Robert Haddon of Center for Nanoscience Innovation for
Defence (CNID), University of California, Riverside. This work is partially
supported by four grants from the National Science Foundation (NSF): ECS-
0401297, ECS-0508218, ECS-0404308, and IIP-0712445, respectively; two grants
from the U.S. Air Force Office of Scientific Research (AFOSR): FA9550-04-1-
0446 and FA9550-05-1-0232, respectively; and one grant co-sponsored by Defence
MicroElectronics Activity (DMEA) and Defence Advanced Research Project
Agency (DARPA): DOD/DMEA-H94003-06-2-0608.
REFERENCES
1. D. A. Thompson and J. S. Best. The Extendibility of Magnetic Recording for Data
Storage. IBM executive briefing: Jan 1998.
2. M. H. Kryder. Data storage technologies for advanced computing. Scientific American,
117 p 72, 1987.
3. S. H. Charap, P. L. Lu, and Y. He. Thermal stability of recorded information at high
densities. IEEE Transactions on Magnetics, 33(1): pp 978-983, 1997.
4. N. H. Bertram and M. Williams. SNR and density limit estimates: a comparison of
longitudinal and perpendicular recording. IEEE Transactions on Magnetics, 36(1): p 4,
1999.
5. S. Iwasaki and Y. Nakamura. An analysis for the magnetization mode for high density
magnetic recording. IEEE Transactions on Magnetics, 13 p 1272, 1977.
6. S. Khizroev, M. H. Kryder, Y. Ikeda, K. Rubin, P. Arnett, M. Best, and D. A.
Thompson. Recording heads with trackwidths suitable for 100Gbit/in2 density. IEEE
Transactions on Magnetics, 35(5): pp 2544-2546, 1999.
7. M. Albrecht, C. T. Rettner, A. Moser, M. E. Best, and B. D. Terris. Recording
performance of high-density patterned perpendicular media. Applied Physics Letters,
81(15): pp 2875-2877, 2002.
8. C. Chappert, H. Bernas, J. Ferre´ , V. Kottler, J. P. Jamet, Y. Chen, E. Cambril,
T. Devolder, F. Rousseaux, V. Mathet, and H. Launois. Science, 280 p 1919, 1998.
9. D. Weller and A. Moser, IEEE Transactions on Magnetics, 35 p 4423, 1999.
10. H. F. Hamann, Y. C. Martin, and H. K. Wickramasighe. Thermally assisted recording
beyond traditional limits. Applied Physics Letters, 84(5): p 810, 2004.
11. P. C. Arnett, D. C. Cheng, S. Khizroev, and D. A. Thompson, inventors; IBM
Almaden Research Center, assignee. Track width control of readback elements via ion