  We present the dielectric and magnetodielectric properties of Pr0.6Ca0.4MnO3
polycrystalline sample. Dielectric permittivity ({\epsilon'}) (and
d{\epsilon'}/dT) portrays the charge order and other magnetic transitions
observed in the magnetization measurement. Dielectric study has revealed a
relaxation corresponding to ordering of polarons ~ 60 K that follows Arrhenius
behaviour both in the presence and absence of magnetic field and another
relaxation was noticed ~ 30 K only under a critical magnetic field (3.2 T) that
shows critical slow down of electronic charges obeying power law. Further, the
magnetic field induced relaxation shifts to low temperatures with the increase
of magnetic field. The observed field induced dielectric relaxation below the
reentered charge ordered state is linked with the rapid motions of boundaries
of the coexisting phases towards the martensite phase transformation.
