<b>Nano-scale Fe–Ni magnetic stability windows and their role in extraterrestrial paleomagnetic records</b>

The simulations systematically explore particle sizes from 3 to 300 nm and axial ratios (AR) from 1 to 5, and characterize magnetic domain states, hysteresis behavior, magnetization-reversal pathways, energy barriers, and thermal relaxation times.</p><p dir="ltr">The dataset is organized into three compressed archives:</p><ul><li><code><strong>cubit.7z</strong></code> — Cubit model-generation and meshing files used to construct the three-dimensional finite-element particle geometries for the different grain sizes and axial ratios.</li><li><code><strong>merrill-script.7z</strong></code> — MERRILL input scripts used for zero-field energy minimization, domain-state calculations, hysteresis simulations, nudged elastic band (NEB) calculations, and related magnetic-stability analyses.</li><li><code><strong>data.7z</strong></code> — Simulation results and processed datasets used in the manuscript and Supporting Information, including magnetic domain-state classifications and transition boundaries, hysteresis parameters (coercivity, <i>B</i>c, and saturation remanence ratio, <i>M</i>rs/<i>M</i>s), mesh-sensitivity tests, NEB energy paths and energy barriers, and calculated relaxation times.</li></ul><p dir="ltr">Together, these files provide the model geometries, numerical inputs, and underlying data required to reproduce the principal micromagnetic results reported in the study.</p>