Raman spectra and structural properties of hexagonal Yb < inf > 1-x < /inf > Dy < inf > x < /inf > MnO < inf > 3 < /inf > (x = 0, 0.05 and 0.1)

Abstract

Single phase Yb1-xDyxMnO3 (x= 0, 0.05 and 0.1) samples are prepared by a solid state reaction method. X-ray powder diffraction shows that all samples crystallize in the hexagonal phase with P63cm space group. The structural analysis shows there is increase in lattice parameter c and cell volume of the hexagonal unit cell with Dy substitution and the average bond length between Mn-O increases. Raman spectra show that the phonon peaks of Yb1-xDyxMnO3 slightly shift to lower frequencies with doping.