Figure 3
(a) Neutron powder diffraction pattern of YMnO3 (open circles) at (a) 1000 K and (b) 1400 K with the corresponding Rietveld refinements (solid lines) using ferroelectric P63cm and P63/mmc space groups, respectively. Tick marks indicate the positions of the Bragg reflections. Difference curves are also shown. Each inset shows a part of the diffraction pattern for 1.875 < d < 2.024 Å. |