DYNAMICS OF MAGNETIZATION IN FRUSTRATED SPIN-CHAINSYSTEMS: Ca_3Co_2O_6

摘要

A two-dimensional Ising-like model for the triangular spin-chain lattice, where each spinchain is treated as a rigid superspin, is proposed to investigate the dynamics of magnetization infrustrated triangular spin-chain systems. The superspins are assumed to interact with the nearestneighbours and external agency (heat reservoir and external magnetic field) that causes them tochange their states randomly with time. A probability of a single spin-flip process is assumed in aGlauber-like form. This technique allows describing the steps in the magnetization curves observedin Ca_3Co_2O_6and their dependence on the magnetic field sweep rate and temperature.