Dynamics of magnetization in frustrated spin-chain system Ca3Co2O6

The magnetization dynamics of the triangular lattice of Ising spin chains is investigated in the framework of a two-dimensional model. The rigid chains are assumed to interact with the nearest-neighboring chains, an external magnetic field, and a heat reservoir that causes the chains to change their states randomly with time. A probability of a single spin-flip process is assumed in a Glauber-type form. This technique allows describing properly the steps in the magnetization curves observed in Ca(3)Co(2)O(6) and their dependence on a magnetic-field sweep rate and temperature. A formation of domain walls due to the nonequilibrium magnetization process and a significant role of their motion are shown.