Magnetic resonance probe of the phase separation in Eu0.7Pb0.3MnO3 single crystal

The magnetic resonance measurements show that the mixed two-phase state takes place in the Eu0.7Pb0.3MnO3 single crystals. The coexistence of the magnetic phases is observed in vicinity of the magnetic phase transition, where the sample exhibits the effect of the CMR. The frequency-field dependences of the spectra allow to conclude that these phases are the paramagnetic and the ferromagnetic ones. Moreover the study of the frequency dependences shows the sensitivity of the mixed-phase state to the external magnetic field. This suggests that the scenario of the phase separation is realized in this case and the mixed two-phase state is not related to simple chemical inhomogeneity