Evolutions of lamellar structure during melting and solidification of Fe9577 nanoparticle from molecular dynamics simulations

► We detail the evolution of lamellar structure in nanoparticle. ► The structural heredity of early embryo is maintained during solidification. ► Internal defect and surface premelting play the same role on melting. ► hcp is found more high-temperature stable than fcc in nanoparticle. ► The difference ΔT = Tm − Ts in this simulation is due to energy barrier of nucleation.