Surface tension of undercooled liquid cobalt

This paper provides the results on experimentally measured and numerically predicted surface tensions of undercooled liquid cobalt. The experiments were performed by using the oscillation drop technique combined with electromagnetic levitation. The simulations are carried out with the Monte Carlo (MC) method, where the surface tension is predicted through calculations of the work of cohesion, and the interatomic interaction is described with an embedded-atom method. The maximum undercooling of the liquid cobalt is reached at 231 K (0.13T_m) in the experiment and 268 K (0.17T_m) in the simulation. The surface tension and its relationship with temperature obtained in the experiment and simulation are σ^exp = 1.93 - 0.000 33 (T - T_m) N m^-1 and σ^cal = 2.26 - 0.000 32 (T - T_m) N m^-1 respectively. The temperature dependence of the surface tension calculated from the MC simulation is in reasonable agreement with that measured in the experiment.