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Magnonics pp 101–115Cite as

Micromagnetic Simulations in Magnonics

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Part of the book series: Topics in Applied Physics ((TAP,volume 125))

Abstract

We review the use of numerical micromagnetic simulations (“micromagnetics”) for investigations in magnonics, the study of spin waves and their quanta – magnons. We argue that, when used with suitable post-processing tools, micromagnetics provide the power and flexibility necessary both for interpretation of complex magnonic phenomena observed in realistic magnetic structures and devices and for prediction of novel effects. We foresee that the development of multiscale and multiphysics extensions of micromagnetic solvers will broaden both the scope of micromagnetic simulations in magnonics and the field of magnonics itself. For example, the extension of micromagnetics to solvers based on atomistic spin models will underpin application of the developed methodology to studies of phenomena involving both magnons and other fundamental excitations of the solid state. In a more distant perspective, it is highly intriguing to study spin waves in non-stationary conditions (i.e. in structures with time dependent material properties), such as those realized in experiments with samples under ultrafast optical pumping.

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Notes

  1. 1.

    The saturation magnetization is M S=8.0×105 A/m, the exchange stiffness is A=1.3×10−11 J/m, and the gyromagnetic ratio is γ=2.32×105 m/As. The corresponding exchange length is \(\sqrt{\frac{2A}{\mu_{0}M_{\mathrm{S}}^{2}}} \approx 5~\mathrm{nm}\). No crystal anisotropy is assumed. The value of the damping constant is specified separately for each simulation.

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Acknowledgements

The authors gratefully acknowledge funding received from the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreements no 233552 (DYNAMAG) and 228673 (MAGNONICS) and from the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom under project EP/E055087/1.

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Authors and Affiliations

  1. School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK

    M. Dvornik, Y. Au & V. V. Kruglyak

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  1. M. Dvornik
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Correspondence to V. V. Kruglyak .

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Editors and Affiliations

  1. Inst. Angewandte Physik, Universität Münster Inst. Angewandte Physik, Münster, Germany

    Sergej O. Demokritov

  2. Department of Physics, Oakland University, Rochester, MI, Michigan, USA

    Andrei N. Slavin

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Dvornik, M., Au, Y., Kruglyak, V.V. (2013). Micromagnetic Simulations in Magnonics. In: Demokritov, S., Slavin, A. (eds) Magnonics. Topics in Applied Physics, vol 125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30247-3_8

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