Specific features of nonlinear optical properties of Eu3+ doped BiFeO3 nanopowders near antiferromagnetic transition

Abstract

The monitoring of the Eu3+ doped BiFeO3 nanopowders was performed near the antiferromagnetic transformation by photoinduced optical second harmonic generation. As photoinduced laser beams we have used bicolor coherent excitations of the Er:glass laser emitting at 1540nm with frequency repetition about 15ns. The studies of the photoinduced SHG were performed versus temperature including the temperature range of ferromagnetic–ferroelectric transition (350°C…390°C). The optimal light polarization and intensity ratio were chosen; the sensitivity of the photoinduced SHG to the multiferroic phase transitions was explored.