Non-equilibrium phase transitions in one-dimensional kinetic Ising models

AbstmcL A family of non-equilibrium kinetic Ising models, introduced earlier, evolving under the competing effect of spin flips at zem tempemre and "west-neighbour random spin exchanges, is further investigated. By increasing the range of spin exchanges and/or theii strength the nature of the phase uansition 'king-to-active ' becomes of (dynamic) mean-field type and a Bnt-order tricitical point is located at the Glauber (8 = 0) limit. Comctions to the mean-field theory are evaluated up to sixth order in a cluster approximation and found to give good results wncming the phase boundary and the critical exponent p of the order parameter which is obtained as 8 1 1.0. 1