Imaging the first-order magnetic transition in La _0.35Pr _0.275Ca _0.375MnO ₃

The nature of the ferromagnetic, charge, orbital, and antiferromagnetic order in La _0.35Pr _0.275Ca _0.375MnO ₃ on the nano- and microscale was investigated by photoemission electron microscopy (PEEM) and resonant elastic soft x-ray scattering (RSXS). The structure of the ferromagnetic domains around the Curie temperature T _C indicates that they nucleate under a high degree of lattice strain, which is brought about by the charge, orbital, and antiferromagnetic order. The combined temperature-dependent PEEM and RSXS measurements suggest that the lattice distortions associated with charge and orbital order are glassy in nature and that phase separation is driven by the interplay between it and the more itinerant charge carriers associated with ferromagnetic metallic order, even well below T _C.