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Fast and Slow Magnetization Processes in Magnetic Recording Media

Published online by Cambridge University Press:  26 February 2011

J. Zhou ,
R. Skomski ,
S. Michalski ,
R. D. Kirby  and
D. J. Sellmyer
J. Zhou
Affiliation:
[email protected], University of Nebraska, Department of Physics and Astronomy and Center for Materials Research and Analysis
R. Skomski
Affiliation:
[email protected]
S. Michalski
Affiliation:
[email protected]
R. D. Kirby
Affiliation:
[email protected]
D. J. Sellmyer
Affiliation:
[email protected]
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Abstract

Information loss due to thermal activation is a major concern in ultrahigh-density magnetic recording media. The usually considered mechanism is thermally activated magnetization reversal over micromagnetic energy barriers. However, micromagnetic approaches ignore local anisotropy fluctuations, which translate into a time-dependent reduction of the remanent magnetization. The effect is negligibly small in macroscopic magnets but becomes important on a scale of a few nanometers.

Keywords

magneticfilmcomposite
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 887: Symposium Q – Degradation Processes in Nanostructured Materials , 2005 , 0887-Q07-08
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

[1] Weller, D. and Moser, A., IEEE Trans. Magn. 35, 4423–4439 (1999).Google Scholar
[2] Sellmyer, D. J. and Skomski, R. (Eds.), “Advanced Magnetic Nanostructures”, Springer, Berlin 2005.Google Scholar
[4] Givord, D. and Rossignol, M. F., in: “Rare-Earth Iron Permanent Magnets”, Ed.: Coey, J. M. D., University Press, Oxford 1996, p. 218–285.Google Scholar
[5] Victora, R. H. and Shen, X., IEEE Trans. Magn. 41, 537 (2005).Google Scholar
[6] Suess, D., Schrefl, T., Fähler, S., Kirschner, M., Hrkac, G., Dorfbauer, F., and Fidler, J., Appl. Phys. Lett. 87, 012504 (2005).Google Scholar
[7] Coey, J. M. D. and Skomski, R., Physica Scripta T 49, 315 (1993).Google Scholar
[8] Kittel, C., “Introduction to Solid-State Physics”, Wiley, New York 1986.Google Scholar
[9] Chipara, M. I., Skomski, R., and Sellmyer, D. J., J. Magn. Magn. Mater. 249, 246 (2002).Google Scholar
[10] Skomski, R. and Coey, J. M. D., “Permanent Magnetism”, Institute of Physics, Bristol 1999.Google Scholar