  We report a comprehensive investigation of La0.2Pr0.4Ca0.4MnO3 to clarify the
micrometre scale phase separation phenomenon in the mixed valent manganite
(La,Pr,Ca)MnO3. The compound shows multiple magnetic transitions, in which the
charge-ordered state is converted into a ferromagnetic state in steps with the
application of a magnetic field. The ac susceptibility measurements show that
the glassy transition at low temperatures does not depend on the frequency,
thus indicating the absence of any spin glass behaviour. Magnetization as well
as heat capacity measurements indicate that this low temperature transition is
magnetic field dependent. The field dependent resistivity at 2K shows a sharp
drop indicating that the sample behaviour changes from a high resistive state
to a low resistive state, corroborating the conversion of charge-ordered
insulating (COI) phase to a ferromagnetic metallic (FMM) phase. Our results
point towards the existence of phase separation, rigidity of the low
temperature glassy-like phase as well as the conversion of COI phase to FMM
phase by the application of magnetic fields.
