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Russian Microelectronics

, Volume 46, Issue 5, pp 309–315 | Cite as

Peculiarities of the energy landscape of a rectangular magnetic nanoisland

  • O. S. TrushinEmail author
  • N. I. Barabanova
Article
  • 25 Downloads

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.

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References

  1. 1.
    Tang, D.D. and Lee, Y.-J., Magnetic Memory. Fundamentals and Technology, Cambridge, UK: Cambridge Univ. Press, 2010.CrossRefGoogle Scholar
  2. 2.
    Handbook of Spintronics, Xu, Y., Awschalom, D.D., and Nitta, J., Eds., Berlin: Springer, 2016.Google Scholar
  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.CrossRefGoogle 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.CrossRefGoogle Scholar
  7. 7.
    Dittrich, R., Finite element calculations of energy barriers in magnetic systems, PhD Dissertation, Wien: Tech. Univ., 2003.pb]Nauka/Interperiodica MoscowGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Institute of Physics and Technology, Yaroslavl’ BranchRussian Academy of SciencesYaroslavl’Russia

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