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

This dataset presents high-resolution micromagnetic simulation results for metallic iron (α-Fe) and iron–nickel alloys — kamacite, taenite, and tetrataenite — at room temperature.It systematically explores the influence of grain size (5–1000 nm) and axial ratio (AR = 0.2–1.0) on domain states, hysteresis behavior, and magnetic stability.The dataset includes:Magnetic domain state statistics and orientation distributions（domains .xlsx & domains-direction .xlsx）Hysteresis parameters (Bc, Mrs/Ms) before and after encrypted test-set verification（hysteresis parameters .xlsx）Relaxation-time data derived from Nudged Elastic Band (NEB) calculations（relaxation-time .xlsx &relaxation-time-added .xlsx）Energy-barrier evolution in α-Fe (AR = 1.0), capturing domain transition pathways（relaxation-time-iron .xlsx）