Fast and Slow Magnetization Processes in Magnetic Recording Media


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.

This is a preview of subscription content, access via your institution.


  1. [1]

    D. Weller and A. Moser, IEEE Trans. Magn. 35, 4423–4439 (1999).

    CAS  Article  Google Scholar 

  2. [2]

    D. J. Sellmyer and R. Skomski (Eds.), “Advanced Magnetic Nanostructures”, Springer, Berlin 2005.

    Google Scholar 

  3. [4]

    D. Givord and M. F. Rossignol, in: “Rare-Earth Iron Permanent Magnets”, Ed.: J. M. D. Coey, University Press, Oxford 1996, p. 218–285.

    Google Scholar 

  4. [5]

    R. H. Victora and X. Shen, IEEE Trans. Magn. 41, 537 (2005).

    Article  Google Scholar 

  5. [6]

    D. Suess, T. Schrefl, S. Fähler, M. Kirschner, G. Hrkac, F. Dorfbauer, and J. Fidler, Appl. Phys. Lett. 87, 012504 (2005).

    Article  Google Scholar 

  6. [7]

    J. M. D. Coey and R. Skomski, Physica Scripta T 49, 315 (1993).

    Article  Google Scholar 

  7. [8]

    C. Kittel, “Introduction to Solid-State Physics”, Wiley, New York 1986.

    Google Scholar 

  8. [9]

    M. I. Chipara, R. Skomski, and D. J. Sellmyer, J. Magn. Magn. Mater. 249, 246 (2002).

    CAS  Article  Google Scholar 

  9. [10]

    R. Skomski and J. M. D. Coey, “Permanent Magnetism”, Institute of Physics, Bristol 1999.

    Google Scholar 

Download references

Author information



Corresponding author

Correspondence to J. Zhou.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Zhou, J., Skomski, R., Michalski, S. et al. Fast and Slow Magnetization Processes in Magnetic Recording Media. MRS Online Proceedings Library 887, 8870708 (2006).

Download citation