Low-temperature structure transition in hexagonal LuFeO3
ORAL
Abstract
The structural change of h-LuFeO$_3$ films at low temperature has been studied using x-ray diffraction and x-ray absorption experiments. The results are analyzed using the displacements of three phonon modes that are related to the P6$_3$/mmc to P6$_3$cm structural transition. The data indicate that the in-plane motion of the Fe and apex oxygen are responsible for the observed anomaly in both x-ray absorption and diffraction experiments. This subtle structural transition may be an origin of the low temperature magnetic phase transition at $T_R$=130 K.
*Research supported by US DOE, Office of Basic Energy Sciences, Materials Science and Engineering Division. Work at BMC is supported by NSF Career award (DMR 1053854). Work at ANL is supported by US-DOE, Office of Science, BES (No. DE-AC02-06CH11357).
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