Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Garanin, Dmitry A"'
Static and dynamic properties of magnetically soft amorphous ferromagnets have been studied analytically and numerically within random-field and random-anisotropy models. External field and coherent anisotropy that are weak compared to their random c
Externí odkaz:
http://arxiv.org/abs/2410.21575
Recently observed scaling in the random-anisotropy model of amorphous or sintered ferromagnets is derived by an alternative method and extended for studying the dynamical properties in terms of the Landau-Lifshitz equations for spin blocks. Switching
Externí odkaz:
http://arxiv.org/abs/2407.21520
We report comprehensive Monte-Carlo studies of the melting of skyrmion lattices in systems of small, medium, and large sizes with the number of skyrmions ranging from $10^{3}$ to over $10^{5}$. Large systems exhibit hysteresis similar to that observe
Externí odkaz:
http://arxiv.org/abs/2406.00825
We report Monte-Carlo studies of the orientational order and melting of a 2D skyrmion lattice containing more than one million spins. Two models have been investigated, a microscopic model of lattice spins with Dzyaloshinskii-Moryia interaction that
Externí odkaz:
http://arxiv.org/abs/2403.00151
Magnetic order and microwave absorption in amorphous ferromagnets and materials sintered from nanoscale ferromagnetic grains are investigated analytically and numerically within the random-anisotropy model. We show that a scaling argument specific to
Externí odkaz:
http://arxiv.org/abs/2311.06843
Abstract We report Monte Carlo studies of lattices of up to $10^{5}$ skyrmions treated as particles with negative core energy and repulsive interaction obtained from a microscopic spin model. Temperature dependence of translational and orientational
Externí odkaz:
http://arxiv.org/abs/2208.06618
Abstract We present finite-temperature Monte Carlo studies of a 2D random-anisotropy magnet on lattices containing one million spins. The correlated spin-glass state predicted by analytical theories is reproduced in simulations, as are the field-cool
Externí odkaz:
http://arxiv.org/abs/2112.15269
Autor:
Garanin, Dmitry A.
Publikováno v:
Phys. Rev. E 104, 055306 (2021)
Energy-correction method is proposed as an addition to mainstream integrators for equations of motion of systems of classical spins. This solves the problem of non-conservation of energy in long computations and makes mainstream integrators competiti
Externí odkaz:
http://arxiv.org/abs/2106.14689
Publikováno v:
Phys. Rev. B 103, 100412 (2021)
Exact conservation of the angular momentum is worked out for an elastic medium with spins. The intrinsic anharmonicity of the elastic theory is shown to be crucial for conserving the total momentum. As a result, any spin-lattice dynamics inevitably i
Externí odkaz:
http://arxiv.org/abs/2101.00620
We propose a novel binary and quaternary memory device based upon skyrmion states induced by the oblique field in a square magnetic island. To describe stable states and dynamics of the skyrmion, we employ the lattice model that uses the parameters o
Externí odkaz:
http://arxiv.org/abs/2009.05384