Specific features of nonlinear optical properties of Eu 3+ doped BiFeO 3 nanopowders near antiferromagnetic transition

Phase transitions in multiferroic Bi1−xEuxFeO3 synthesized by sol-gel method

“…The x-ray diffraction results of BEFO (x = 0, 0.05, 0.10, 0.15 and 0.20) are shown in figure 1 indicating that the BEFO < x 0.20 compounds crystallize in the rhombohedral lattice with space group R3c (α-phase) with a transition from rhombohedral to cubic one with space group Pm3m (γ-phase) for = x 0.20 [6][7][8]. The structural parameters determined from the XRD-patterns are listed in table 1.…”

“…Bi 1-x Eu x FeO 3 , synthesized by sol-gel method and embedded into the PVA polymer matrices can be used as materials for laser induced gratings [6]. It was also observed in Bi 1-x Eu x FeO 3 that the photoinduced optical second harmonic generation, which uses two bicolor coherent laser beams incident under different angles, gave some enhancement of the SHG output near the antiferromagnetic phase transitions temperature [7,8]. The effect of Eu substitution on structural, vibrational, and magnetic properties in Bi 1-x Eu x FeO 3 (   x 0 0.8) solid solution was reported where correlation between concentration, phase, local structure, and magnetism was explained [9].…”

Enhanced directional second harmonic radiation via nonlinear interference in 1D metamaterials

“…Ultimately, this creates a pathway for nonlinear interfer ence to occur relatively close to a resonance, leading to the enhancement of the directional SH power. As nonlinear mag netoelectric coupling has also been observed in nanoscale materials such as [23], the physical concepts demonstrated in this work hold promising potential to be exploited to simi larly achieve an enhanced directional nonlinear radiation via nonlinear interference in advanced materials of metaatom at the size of nanoscale.…”