Lattice anomalies in the FeAs${}_4$ tetrahedra of the NdFeAsO${}_{0.85}$ superconductor that disappear at T${}_{\mathrm{c}}$

M. Calamiotou, I. Margiolaki, A. Gantis +4

High resolution synchrotron X-ray powder diffraction (SXRPD) was used to study the temperature dependence of the oxygen deficient NdFeAsO${}_{0.85}$ superconducting compound. By empl…