99 citations · 810 across the 32 of their papers we have counts for
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Sculpting Spin-Wave Landscapes via Curvature of 2D Magnonic Crystals
Ondřej Wojewoda, Robert Kraft, Olha Bezsmertna +11
Engineering the dispersion relation is one of the key ingredients enabling the application of spin waves in computational elements. One way to engineer the spin-wave band structure…
Magnetic Vortex Dynamics on a Spherical Cap
Mykola I. Sloika, Yuri Gaididei, Volodymyr P. Kravchuk +3
By tailoring geometrical properties of magnetic nanocap structures, new possibilities appear to control its magnetic properties, such as the dynamics of magnetic vortices. Here, we…
Manipulation by magnetic frustration in ferrotoroidal spin chains via curvature and torsion
Oleksandr V. Pylypovskyi, Enrico Di Benedetto, Carmine Ortix +1
Geometric effects in curvilinear nanomagnets can enable chiral, anisotropic and even magnetoelectric responses. Here, we study the effects of magnetic frustration in curvilinear (q…
Field-induced spin reorientation transitions in antiferromagnetic ring-shaped spin chains
Yelyzaveta A. Borysenko, Denis D. Sheka, Jürgen Fassbender +3
Easy axis antiferromagnets are robust against external magnetic fields of moderate strength. Spin reorientations in strong fields can provide an insight into more subtle properties…
Circular stripe domains and cone state vortices in disk-shaped exchange coupled magnetic heterostructures
Oleksandr Zaiets, Volodymyr P. Kravchuk, Oleksandr V. Pylypovskyi +2
Vertically stacked exchange coupled magnetic heterostructures of cylindrical geometry can host complex noncolinear magnetization patterns. By tuning the interlayer exchange couplin…
Impact of curvature-induced Dzyaloshinskii-Moriya interaction on magnetic vortex texture in spherical caps
Mykola I. Sloika, Yuri Gaididei, Volodymyr P. Kravchuk +3
Geometric curvature of nanoscale magnetic shells brings about curvature-induced anisotropy and Dzyaloshinskii-Moriya interaction (DMI). Here, we derive equations to describe the pr…
Nanoscale mechanics of antiferromagnetic domain walls
Natascha Hedrich, Kai Wagner, Oleksandr V. Pylypovskyi +5
Antiferromagnets offer remarkable promise for future spintronics devices, where antiferromagnetic order is exploited to encode information. The control and understanding of antifer…
Curvilinear one-dimensional antiferromagnets
Oleksandr V. Pylypovskyi, Denys Y. Kononenko, Kostiantyn V. Yershov +6
Antiferromagnets host exotic quasiparticles, support high frequency excitations and are key enablers of the prospective spintronic and spin-orbitronic technologies. Here, we propos…
Unidirectional tilt of domain walls in equilibrium in biaxial stripes with Dzyaloshinskii-Moriya interaction
Oleksandr V. Pylypovskyi, Volodymyr P. Kravchuk, Oleksii M. Volkov +3
The orientation of a chiral magnetic domain wall in a racetrack determines its dynamical properties. In equilibrium, magnetic domain walls are expected to be oriented perpendicular…
Curvature induced magnonic crystal in nanowires
Anastasiia Korniienko, Volodymyr P. Kravchuk, Oleksandr V. Pylypovskyi +3
A new type of magnonic crystals, curvature induced ones, is realized in ferromagnetic nanowires with periodically deformed shape. A magnon band structure of such crystal is fully d…
Micromagnetic Theory of Curvilinear Ferromagnetic Shells
Denis D. Sheka, Oleksandr V. Pylypovskyi, Pedro Landeros +3
Here, we present a micromagnetic theory of curvilinear ferromagnets, which allows discovering novel fundamental physical effects which were amiss. In spite of the firm confidence f…
Engineered Chiral Skyrmion and Skyrmionium States by the Gradient of Curvature
Oleksandr V. Pylypovskyi, Denys Makarov, Volodymyr P. Kravchuk +3
Curvilinear nanomagnets can support magnetic skyrmions stabilized at a local curvature without any intrinsic chiral interactions. Here, we propose a new mechanism to stabilize chir…
Geometry-induced motion of magnetic domain walls in curved nanostripes
Kostiantyn V. Yershov, Volodymyr P. Kravchuk, Denis D. Sheka +3
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-…
Localization of magnon modes in a curved magnetic nanowire
Yuri Gaididei, Volodymyr P. Kravchuk, Franz G. Mertens +4
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 e…
Magnetization in narrow ribbons: curvature effects
Yuri Gaididei, Arseni Goussev, Volodymyr P. Kravchuk +5
A ribbon is a surface swept out by a line segment turning as it moves along a central curve. For narrow magnetic ribbons, for which the length of the line segment is much less than…
Geometry induced phase transitions in magnetic spherical shell
Mykola I. Sloika, Denis D. Sheka, Volodymyr P. Kravchuk +2
Equilibrium magnetization states in thin spherical shells of a magnetically soft ferromagnet are determined by the competition between two interactions: (i) The local exchange inte…
Rashba Torque Driven Domain Wall Motion in Magnetic Helices
Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk +3
Manipulation of the domain wall propagation in magnetic wires is a key practical task for a number of devices including racetrack memory and magnetic logic. Recently, curvilinear e…
Magnetochiral symmetry breaking in a Möbius ring
Oleksandr V. Pylypovskyi, Volodymyr P. Kravchuk, Denis D. Sheka +3
We show that the interaction of the magnetic subsystem of a curved magnet with the magnet curvature results in coupling of a topologically nontrivial magnetization pattern and topo…
Effects of Surface Anisotropy on Magnetic Vortex Core
Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk +1
The vortex core shape in the three dimensional Heisenberg magnet is essentially influenced by a surface anisotropy. We predict that depending of the surface anisotropy type there a…
Regular and chaotic vortex core reversal by a resonant perpendicular magnetic field
Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk +2
Under the action of an alternating perpendicular magnetic field the polarity of the vortex state nanodisk can be efficiently switched. We predict the regular and chaotic dynamics o…
Mechanism of Fast Axially--Symmetric Reversal of Magnetic Vortex Core
Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk +2
The magnetic vortex core in a nanodot can be switched by an alternating transversal magnetic field. We propose a simple collective coordinate model which describes comprehensive vo…
Bloch Point Structure in a Magnetic Nanosphere
Oleksandr V. Pylypovskyi, Denis D. Sheka, Yuri Gaididei
The micromagnetic singularity, the so-called Bloch point, can form a metastable state in the nanosphere. We classify possible types of Bloch points and derive analytically the shap…