Structural And Phonon Modes Of Multiferroic Bi_(0.9)Ca_(0.1)Fe_(0.9)Co_(0.1)O_(3) Nanoparticles

摘要

Multiferroic Bi_(0.9)Ca_(0.1)Fe_(0.9)Co_(0.1)O_(3) [BCFCO] nanoparticles of 23 nm were successfully prepared by chemical co-precipitation method. The x-ray diffraction patterns confirmed the formation of single-phase perovskite structure. Rietveld-refinement of crystal structure parameters revealed the existence of rhombohedral R3c symmetry. Raman spectrum identifies the five active optical phonon modes (A_(1)-2, E-2, A_(1)-4, E-8, E-9). The BCFCO nanomaterials sample shows the lower frequency shift in Raman modes as compared to pure BiFeO_(3) and is attributed to the structural distortion at Fe site.