RiTM in HZDR
One extremely snowy day, part of RiTM group met in Helmholtz-Zentrum Dresden Rossendorf. Potentially new member tries to tunnel through metal wall behind us.
Shape transformations in flexible magnetic rings
The development of motility mechanisms controllable on the sub-micron length scale is crucial for both nanorobotics and shapeable magnetoelectronics. We showcase that the nanoscale shape deformation of a flexible magnet can be controlled by its magnetic attributes. Namely, we consider a problem of coupling the geometrical and magnetic degrees of…
Chiral Skyrmion and Skyrmionium States Engineered by the Gradient of Curvature
Curvilinear nanomagnets can support magnetic skyrmions stabilized at a local curvature without any intrinsic chiral interactions. Here, we propose an alternative mechanism to stabilize chiral Néel skyrmion states relying on the gradient of curvature. We illustrate our approach with an example of a magnetic thin film with perpendicular magnetic anisotropy…
Geometry-induced motion of magnetic domain walls in curved nanostripes
Dynamics of topological magnetic textures are typically induced externally by, e.g., magnetic fields or spin/charge currents. Here, we demonstrate the effect of the internal-to-the-system geometry-induced motion of a domain wall in a curved nanostripe. Being driven by a gradient of the curvature of a stripe with biaxial anisotropy, transversal domain…
Tracking Git commits info in LaTeX docs
Last time we wrote how to use Git + TeXStudio (especially with Overleaf) bundle to collaborate on papers and track changes. During the work it may be useful to show information about current commit/author/(time of change) directly in the document. We found a few ways to do it. The simplest…
Localization of magnon modes in a curved magnetic nanowire
Spin waves in magnetic nanowires can be bound by a local bending of the wire. The eigenfrequency of a truly local magnon mode is determined by the curvature: a general analytical expression is established for any infinitesimally weak localized curvature of the wire. The interaction of the local mode with…
Multiplet of Skyrmion States on a Curvilinear Defect: Reconfigurable Skyrmion Lattices
Typically, the chiral magnetic Skyrmion is a single-state excitation. Here we propose a system, where multiplet of Skyrmion states appears and one of these states can be the ground one. We show that the presence of a localized curvilinear defect drastically changes the magnetic properties of a thin perpendicularly magnetized…
Spin eigenmodes of magnetic skyrmions and the problem of the effective skyrmion mass
The properties of magnon modes localized on a ferromagnetic skyrmion are studied. Mode eigenfrequencies display three types of asymptotic behavior for large skyrmion radius. A number of properties of the magnon eigenfunctions are determined. This enables us to demonstrate that the skyrmion dynamics for a traveling-wave ansatz obeys the massless…
Mesoscale Dzyaloshinskii-Moriya interaction: geometrical tailoring of the magnetochirality
Crystals with broken inversion symmetry can host fundamentally appealing and technologically relevant periodical or localized chiral magnetic textures. The type of the texture as well as its magnetochiral properties are determined by the intrinsic Dzyaloshinskii-Moriya interaction (DMI), which is a material property and can hardly be changed. Here we put…
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