The temperature dependent local structure of TbMn 2 O 5 was determined by x-ray absorption spectroscopy.An anomalous Tb-O distribution is found. At high temperature it is broad but resolves into two distinct peaks below ~180 K. The distributions sharpen below the Tb magnetic ordering temperature (~10 K). The distortions in the Tb-O distribution, away from the Pbam structure, are consistent with rotations of the MnO x polyhedra about the c-axis and suggest that Tb-O bond polarization may play a significant role in the observed ferroelectric properties of this system.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.