Zusammenfassung
We study, using Monte Carlo dynamics, the time (\$t\$) dependent average
magnetization per spin \$m(t)\$ behavior of 2-D kinetic Ising model under a
binary (\$h\_0\$) stochastic field \$h(t)\$. The time dependence of the
stochastic field is such that its average over each successive time interval
\$\tau\$ is assured to be zero (without any fluctuation). The average
magnetization \$Q=(1/\tau)ınt\_0^\tau m(t) dt\$ is considered as order
parameter of the system. The phase diagram in (\$h\_0,\tau\$) plane is obtained.
Fluctuations in order parameter and their scaling properties are studied across
the phase boundary. These studies indicate that the nature of the transition is
Ising like (static Ising universality class) for field amplitudes \$h\_0\$ below
some threshold value \$h\_0^c(\tau)\$ (dependent on \$\tau\$ values;
\$h\_0^c\rightarrow0\$ as \$\tau\rightarrowınfty\$ across the phase boundary) .
Beyond these \$h\_0^c (\tau)\$, a discontinuous phase transition occurs.
Nutzer