Skip to main content

Peculiarities of the energy landscape of a rectangular magnetic nanoisland

Abstract

Micromagnetic modeling is used to study the energetics of magnetic switching of a rectangular single-layer permalloy nanoisland. The potential local energy minima of this system are found in the absence of an external field. The magnetization reversal along the long axis of the island is studied at different values of a constant transverse bias field. It is found that the presence of such a bias leads to a reduction of the longitudinal switching field. The energy landscape of the system is studied using the Nudged Elastic Band (NEB) method to shed more light on the nature of the effect. It is shown that the energy barrier for longitudinal switching is reduced with the growth of the magnitude of the transverse bias. This effect may have practical applications for optimizing MRAM technology, because it helps reduce the memory cell’s switching field.

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

References

  1. 1.

    Tang, D.D. and Lee, Y.-J., Magnetic Memory. Fundamentals and Technology, Cambridge, UK: Cambridge Univ. Press, 2010.

    Book  Google Scholar 

  2. 2.

    Handbook of Spintronics, Xu, Y., Awschalom, D.D., and Nitta, J., Eds., Berlin: Springer, 2016.

  3. 3.

    Klaui, M. and Fernandes Vaz, C.A., Magnetization configurations and reversal in small magnetic elements, in Handbook of Magnetism and Magnetic Materials, Kronmüller H. and Parkin S., Eds., New York: Wiley, 2007, vols. 1–5.

    Google Scholar 

  4. 4.

    Trushin, O.S. and Barabanova, N.I., Micromagnetic software package MICROMAG and its applications to study elements of spintronics, Russ. Microelectron., 2013, vol. 42, no. 3, pp. 176–183.

    Article  Google Scholar 

  5. 5.

    Jonsson, H., Mills, G., and Jacobsen, K.W., Nudged elastic band method for finding minimum energy paths of transitions, in Classical and Quantum Dynamics in Condensed Phase Simulations, Berne, B.J., Ciccotti, G., and Coker, D.F., Eds., Singapore: World Scientific, 1998.

    Google Scholar 

  6. 6.

    Suess, D. et al., Reliability of sharrocks equation for exchange spring bilayers, Phys. Rev. B, 2007, vol. 75, pp. 174430–1–174430–11.

    Article  Google Scholar 

  7. 7.

    Dittrich, R., Finite element calculations of energy barriers in magnetic systems, PhD Dissertation, Wien: Tech. Univ., 2003.pb]Nauka/Interperiodica Moscow

    Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to O. S. Trushin.

Additional information

Original Russian Text © O.S. Trushin, N.I. Barabanova, 2017, published in Mikroelektronika, 2017, Vol. 46, No. 5, pp. 332–339.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Trushin, O.S., Barabanova, N.I. Peculiarities of the energy landscape of a rectangular magnetic nanoisland. Russ Microelectron 46, 309–315 (2017). https://doi.org/10.1134/S1063739717050110

Download citation