Rotating skyrmion lattices by spin torques and field or temperature gradients
By K. Everschor, M. Garst, B. Binz, F. Jonietz, S. Muhlbauer, C. Pfleiderer, Achim Rosch. 2012
171 citations recorded by the source corpus.
Chiral magnets like MnSi form lattices of skyrmions, i.e., magnetic whirls, which react sensitively to small electric currents j above a critical current density jc. The interplay of these currents with tiny gradients of either the magnetic field or the temperature can induce a rotation of the magnetic pattern for j$>$jc. Either a rotation by a finite angle of up to 15$irc$ or\textemdash{}for larger gradients\textemdash{}a continuous rotation with a finite angular velocity is induced. We use Landau-Lifshitz-Gilbert equations extended by extra damping terms in combination with a phenomenological treatment of pinning forces to develop a theory of the relevant rotational torques. Experimental neutron scattering data on the angular distribution of skyrmion lattices suggest that continuously rotating domains are easy to obtain in the presence of remarkably small currents and temperature gradients.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/42f1d71f6408de045dd6ab3eeed2e6d704dd872c
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In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Skyrmions in magnetic multilayers (2017, background): “Stimulated by the nontrivial spin topology of magnetic skyrmions, many other new and exciting topological transport phenomena have been theoretically proposed [91-94] and”
- Interface-Induced Phenomena in Magnetism (2016, unknown): “They exhibit current-driven displacement at current densities far below that needed to drive magnetic domain walls, a result of potential technological significance [Al'Khawaja and Stoof, 2001; Jonietz et al., 2010; Zang et al., 2011; Everschor, 2012; Yu et al., 2012; Iwasaki et al., 2013a; Iwasaki ”
- Current-induced skyrmion dynamics in constricted geometries. (2013, background): “This characteristic can be explained by the Thiele equation for the centre of mass R = (X, Y ) [14, 15] of a spin texture (see Supplementary Information I for details):”