Thermal collapse of a skyrmion

Derras-Chouk, Amel; Chudnovsky, Eugene M.; Garanin, Dmitry A.

doi:10.1063/1.5109728

Title: Thermal collapse of a skyrmion

Journal Article · 22 August 2019 · Journal of Applied Physics

DOI: https://doi.org/10.1063/1.5109728 · OSTI ID:1593707

^[1];

^[2]; Garanin, Dmitry A. ^[2]

City Univ. of New York (CUNY), NY (United States); Lehman College of the City University of New York
City Univ. of New York (CUNY), NY (United States)

Thermal collapse of an isolated skyrmion on a two-dimensional spin lattice has been investigated. The method is based upon solution of the system of stochastic Landau-Lifshitz equations for up to 10⁴ spins. The recently developed pulse-noise algorithm has been used for the stochastic component of the equations. The collapse rate follows the Arrhenius law. Analytical formulas derived within a continuous spin-field model support numerically-obtained values of the energy barrier. The pre-exponential factor is independent of the phenomenological damping constant that implies that the skyrmion is overcoming the energy barrier due to the energy exchange with the rest of the spin system. Our findings agree with experiments, as well as with recent numerical results obtained by other methods.

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Research Organization:: City Univ. of New York (CUNY), NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: FG02-93ER45487

OSTI ID:: 1593707

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 126; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Universality of annihilation barriers of large magnetic skyrmions in chiral and frustrated magnets Heil, Benjamin; Rosch, Achim; Masell, Jan Physical Review B, Vol. 100, Issue 13 https://doi.org/10.1103/physrevb.100.134424	journal	October 2019
Universality of annihilation barriers of large magnetic skyrmions in chiral and frustrated magnets Heil, Benjamin; Rosch, Achim; Masell, Jan arXiv https://doi.org/10.48550/arxiv.1907.12174	text	January 2019

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