Showing papers by "Shigeo Mori published in 2004"
TL;DR: In this paper, structural changes related to the charge ordering (CO) in the temperature window between 100K and room temperature (RT) in YFe2O4 − δ were examined by transmission electron microscopy.
Abstract: We examined structural changes related to the charge ordering (CO) in the temperature window between 100K and room temperature (RT) in YFe2O4 − δ by transmission electron microscopy. Characteristic diffuse scattering elongated along the [1] direction through the (1/3 1/3 0)-type reciprocal positions was found at RT, which is related to nano-sized domains due to the CO. In addition, we found the presence of the superlattice structures characterized by the (1/4 1/4 0)-type modulation vector at 150K and by the (0 1/2 0)-type modulation vector at 200 K. The changes in the superlattice structures as a function of the temperature should be strongly related to the dielectric anomalies in YFe2O4 − δ.
2 citations
TL;DR: In this article, the authors reported a resonant X-ray diffraction and a transmission electron microscope observation on triangular layered oxide RFe 2 O 4 (R=Lu and Y) and concluded that the observed super structure is derived from the charge ordering on triangular plane.
2 citations