DYNAMICS OF MAGNETIZATION IN FRUSTRATED SPIN-CHAIN SYSTEMS: Ca_3Co_2O_6

摘要

A two-dimensional Ising-like model for the triangular spin-chain lattice, where each spin chain is treated as a rigid superspin, is proposed to investigate the dynamics of magnetization in frustrated triangular spin-chain systems. The superspins are assumed to interact with the nearest neighbours and external agency (heat reservoir and external magnetic field) that causes them to change their states randomly with time. A probability of a single spin-flip process is assumed in a Glauber-like form. This technique allows describing the steps in the magnetization curves observed in Ca_3Co_2O_6 and their dependence on the magnetic field sweep rate and temperature.