Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
1 PublikationCurvature-Induced Asymmetric Spin-Wave Dispersion
Otálora, A. S.; Yan, M.; Schultheiss, H.; Hertel, R.; Kákay, A.
Abstract
In magnonics, spin waves are conceived of as electron-charge-free information carriers. Their wave behavior has established them as the key elements to achieve low power consumption, fast operative rates, and good packaging in magnon-based computational technologies. Hence, knowing alternative ways that reveal certain properties of their undulatory motion is an important task. Here, we show using micromagnetic simulations and analytical calculations that spin-wave propagation in ferromagnetic nanotubes is fundamentally different than in thin films. The dispersion relation is asymmetric regarding the sign of the wave vector. It is a purely curvature-induced effect and its fundamental origin is identified to be the classical dipole-dipole interaction. The analytical expression of the dispersion relation has the same mathematical form as in thin films with the Dzyalonshiinsky-Moriya interaction. Therefore, this curvatureinduced effect can be seen as a “dipole-induced Dzyalonshiinsky-Moriya-like” effect.
Keywords: nanotubes; spin-wave dispersion; non-reciprocal
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Physical Review Letters 117(2016), 227203
DOI: 10.1103/PhysRevLett.117.227203
Cited 104 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-24431