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Maksim M. Gordei

Publications and source records attributed to Maksim M. Gordei.

2 recordsLinked to original sources
arXiv2026

Spatial decay of isolated magnetic hopfions in chiral helimagnets

Magnetic hopfions in chiral magnets are topological solitons, localized in three dimensions. But is their localization strong? To address this question we derive an asymptotic expansion for the isolated hopfion's spatial profile. It becomes starting point for a simple analytical model, which is asymptotically correct both near the hopfion center and far away from it. Region of equilibrium hopfions on the phase diagram of a helimagnet is computed and material requirements for supporting movable isolated magnetic hopfions on uniform background are discussed.

cond-mat.mes-hall↗
arXiv2025

Control of the magnetic hopfion lattice in helimagnet with the external field and anisotropy

A generalized micromagnetic model of hopfions in a helimagnet with a two-dimensional (allowing both radial and azimuthal dependence) profile function is considered. Calculations confirm the elliptical stability of hopfions and the previously obtained analytical expression for the upper critical field of their lattice. Dependencies of the hopfion lattice periods on the magnitude of the applied external magnetic field and the uniaxial anisotropy constant of the material are obtained. It is shown that in an anisotropic helimagnet, the hopfion lattice expands in the direction of the anisotropy axis, and the expansion can be controlled by the external field and the uniaxial anisotropy constant.

cond-mat.mes-hall↗