  Here, a dynamical Monte-Carlo (DMC) method is used to study
temperature-dependent dynamical magnetization of famous Mn2Ni system as typical
example of single-chain magnets with strong magnetic anisotropy. Simulated
magnetization curves are in good agreement with experimental results under
typical temperatures and sweeping rates, and simulated coercive fields as
functions of temperature are also consistent with experimental curves. Further
analysis indicates that the magnetization reversal is determined by both
thermal-activated effects and quantum spin tunnelings. These can help explore
basic properties and applications of such important magnetic systems.
