Single Phase Synthesis and Room temperature Neutron Diffraction Studies on Multiferroic PbFe0.5Nb0.5O3

摘要

The Lead-iron-niobate, (PbFe0.5Nb0.5O3 or PFN) was synthesized by lowtemperature sintering Single Step / Solid State Reaction Method. The 700 C / 2hrs calcined powder was sintered at 1050 C / 1 hr. The sintered pellets werecharacterized through X-Ray Diffraction and Neutron Diffraction at roomtemperature. It is found from the XRD pattern that the materials is in singlephase with no traces of pyrochlore phase. It was also confirmed from theneutron diffraction pattern, the structure of PFN to be monoclinic, belongs tospace group C m. Structural studies has been carried out by refining theobtained neutron diffraction data by Reitveld refinement method using Full ProfProgram. The neutron diffraction pattern at 290K (near room temperature) wasselected to refine the structure. The Lattice parameters obtained are; a =5.6709 A, b = 5.6732, c = 4.0136 and {\alpha} = 90, \b{eta} = 89.881, {\gamma}= 90.000. The P-E measurements showed hysteretic behavior with high remnantpolarization.