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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:
jhou@unlserve.unl.edu, University of Nebraska, Department of Physics and Astronomy and Center for Materials Research and Analysis
R. Skomski
Affiliation:
rskomski2@unl.edu
S. Michalski
Affiliation:
michalsk@unlserve.unl.edu
R. D. Kirby
Affiliation:
rkirby1@unl.edu
D. J. Sellmyer
Affiliation:
dsellmyer@unl.edu
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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

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