  The finite size analysis of the nonequilibrium phase transition, in two
dimensional Ising ferromagnet driven by plane propagating magneticwave, is
studied by Monte Carlo simulation. It is observed that the system undergoes a
nonequilibrium dynamicphase transition from a high temperature dynamically
symmetric ({\it propagating}) phase to a low temperature dynamically
symmetry-broken ({\it pinned}) phase as the system is cooled below the
transition temperature. This transition temperature is determined precisely by
studying the fourth order Binder Cumulant of the dynamic order parameter as a
function of temperature for different system sizes ($L$). From the finite size
analysis of dynamic order parameter ($Q_L \sim L^{-{{\beta} \over {\nu}}}$) and
the dynamic susceptibility ($\chi^{Q}_{L} \sim L^{{\gamma} \over {\nu}}$), we
have estimated the critical exponents $\beta/\nu=0.146\pm0.025$ and
$\gamma/\nu=1.869\pm0.135$ (measured from the data read at the critical
temperature obtained from Binder cumulant), and $\gamma/\nu=1.746\pm0.017$
(measured from the peak positions of dynamic susceptibility). Our results
indicate that such driven Ising ferromagnet belongs to the same universality
class of the two-dimensional equilibrium Ising ferromagnet (where
$\beta/\nu=1/8$ and $\gamma/\nu=7/4$), within the limits of statistical errors.
