  The low-temperature and high-magnetic field (2K, 8T) powder x-ray diffraction
(LTHM-XRD) measurements have been carried out at different temperatures (T) and
magnetic fields (H) to investigate the structural phase diagram for phase
separated La0.175Pr0.45Ca0.375MnO3 (LPCMO) manganite. The antiferromagnetic
(AFM) P21/m insulating phase undergoes field induced transformation to
ferromagnetic (FM) Pnma metallic ground state below its AFM ordering
temperature (220K) in zero-field cooling (ZFC) from room temperature. At
temperature greater than 25K, the field induced FM Pnma phase remained
irreversible even after complete removal of field. However, for T ( 39-65K),
the field induced transformation is partially reversible. This behaviour has
been attributed to magnetic field induced devitrification of the glass-like
arrested AFM P21/m phase to FM Pnma equilibrium phase. The devitrified FM Pnma
phase starts transforming back to AFM P21/m phase around ~39K on heating the
sample under zero field. Our results corroborate the evidence of strong
magneto-structural coupling in this system. An H-T phase-diagram has been
constructed based on LTHM-XTD data, which resembles with the one made from
magnetic measurements. These results have been explained on the basis of
kinetic arrest of first order phase transition and field induced
devitrification of the arrested phase.
