This title appears in the Scientific Report : 2003 

The kinetic spherical model in a magnetic field
Paessens, M.
Henkel, M.
Theorie II; IFF-TH-II
Journal of physics / A, 36 (2003) S. 8983 - 9008
Bristol IOP Publ. 2003
8983 - 9008
Journal Article
Kondensierte Materie
Journal of Physics A - Mathematical and General 36
Please use the identifier: in citations.
The long-time kinetics of the spherical model in an external magnetic field and below the equilibrium critical temperature is studied. The solution of the associated stochastic Langevin equation is reduced exactly to a single nonlinear Volterra equation. For a sufficiently small external field, the kinetics of the magnetization reversal transition from the metastable to the ground state is compared to the ageing behaviour of coarsening systems quenched into the low-temperature phase. For an oscillating magnetic field and below the critical temperature, we find evidence for the absence of the frequency-dependent dynamic phase transition, which was observed previously to occur in Ising-like systems.