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Micromagnetic simulation dataset for disorder-driven breakdown of rigid-Thiele Néel-skyrmion transport in granular ferromagnetic tracks

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Zenodo2026-08-16 更新2026-08-20 收录
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This dataset contains the post-processed numerical results and analysis tables supporting the revised manuscript "Disorder-driven breakdown of rigid-Thiele skyrmion transport in granular ferromagnetic tracks" by Shi Haohan. The data were generated from MuMax3 micromagnetic simulations of current-driven Néel skyrmion transport in a generic Co/Pt-like perpendicular-magnetic-anisotropy and interfacial-DMI ferromagnetic racetrack. The simulated track is a 768 nm × 384 nm × 1 nm rectangular thin film with periodic boundary conditions along the transverse direction and open boundaries along the longitudinal direction. Grain-wise anisotropy disorder is introduced using a Voronoi tessellation with an average grain size of approximately 30 nm. This revised Zenodo record version uses the final V5 post-processed workbook and supersedes the earlier 98-run dataset associated with the original submission. It retains the primary fixed-drive disorder ensemble used for the main statistical analysis and adds revision-stage supplementary datasets used to support the current–disorder phase diagram, seed-resolved first-pinning-amplitude analysis, boundary-exit classification, mesh-convergence checks, and long-time robustness checks. Version 4 (this version) extends the record with the finite-temperature campaign introduced in the second revision (new Section 4.9, Figures 8–9, and Table 5 of the manuscript). It adds 190 stochastic-LLG runs (187 passing an integration-quality gate) on the same geometry, disorder realisations, and drive as the athermal dataset, using the Brown thermal fluctuation field. The files added in this version are the finite-temperature master workbook (skyrmion_full_summary_v6_with_finiteT.xlsx, whose 17 zero-temperature sheets are unchanged and which adds ten FiniteT_* sheets), a per-run table (finiteT_all_runs_master.csv), and two analysis reports (finiteT_fate_report.txt, finiteT_walltime_report.txt). The principal finite-temperature results are that the clean rigid-Thiele closure survives to 300 K (90% of the athermal drift speed), that every realisation pinned at T = 0 escapes at 300 K so the first-pinning amplitudes are a zero-temperature bound, and that a bulk-annihilation channel strictly absent from the athermal archive opens at finite temperature. All zero-temperature files from previous versions are unchanged. The main fixed-drive analysis is performed at J* = 3 × 10^11 A m^-2 over disorder amplitudes δ = 0–0.10. The released workbook includes post-processing summaries for the clean benchmark, the combined Phase 1 and Phase 2 disorder scans, per-disorder regime statistics, seed-resolved pinning maps, empirical first-pinning-amplitude distribution P(δc), current–disorder supplementary scans, and revision-stage robustness checks. The principal physical conclusions supported by this dataset are:(i) the clean transport branch is quantitatively described by a single-parameter rigid-Thiele calibration;(ii) all topological-charge-loss events in the analysed archive are boundary exits rather than bulk annihilations;(iii) the pinned fraction follows a three-regime disorder dependence with a crossover near δcross ≈ 0.05;(iv) the onset of pinning is governed by a reproducible seed-resolved first-pinning-amplitude distribution P(δc);and (v) independent seed pools reproduce the same qualitative depinning hierarchy within statistical uncertainty. The released workbook contains the run-level observables, including disorder amplitude, current density, seed number, runtime, fit window, topological-charge statistics, fitted drift velocities, drift speed, apparent Hall angle, regime classification, and notes used for boundary-exit and pinning classification.

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Zenodo
创建时间:
2026-08-16
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