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Spin waves on chains of YIG particles: dispersion relations, Faraday rotation, and power transmission

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  • Nicholas A. Pike

    (The Ohio State University
    University of Liege)

  • David Stroud

    (The Ohio State University)

Abstract

We calculate the dispersion relations for spin waves on a periodic chain of spherical or cylindrical Yttrium Iron Garnet (YIG) particles. We use the quasistatic approximation, appropriate when kd ≪ 1, where k is the wave number and d the interparticle spacing. In this regime, because of the magnetic dipole-dipole interaction between the localized magnetic excitations on neighboring particles, dispersive spin waves can propagate along the chain. The waves are analogous to plasmonic waves generated by electric dipole-dipole interactions between plasmons on neighboring metallic particles. The spin waves can be longitudinal (L), transverse (T), or elliptically polarized. We find that a linearly polarized spin wave undergoes a Faraday rotation as it propagates along the chain. The amount of Faraday rotation can be tuned by varying the off-diagonal component of the permeability tensor. We also discuss the possibility of wireless power transmission along the chain using these coupled spin waves.

Suggested Citation

  • Nicholas A. Pike & David Stroud, 2017. "Spin waves on chains of YIG particles: dispersion relations, Faraday rotation, and power transmission," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 90(3), pages 1-9, March.
    • Handle: RePEc:spr:eurphb:v:90:y:2017:i:3:d:10.1140_epjb_e2017-70609-7
    DOI: 10.1140/epjb/e2017-70609-7
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    Mesoscopic and Nanoscale Systems;

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