55Mn NMR study of the effect of a constant magnetic field on the phase separation of the ferromagnetic phase in manganites

The ⁵⁵Mn NMR studies of nano-sized and polycrystalline La_{1 ? x} Ca _x MnO₃ samples have been performed. It has been shown that a decrease in the average size of the nanoparticles leads to the disappearance of the phase separation of the ferromagnetic phase, which is likely a general property of manganites. The studies in constant magnetic fields have demonstrated that the phase separation under consideration occurs within domains rather than as a result of the separation of the samples into domains and domains walls.