Observation of a second-order distortion in Nd3Co4Sn13
Journal
Physica B: Condensed Matter
Journal Volume
551
Pages
12-15
Date Issued
2018
Author(s)
Wang C.W., Kuo C.N., Liu H.F., Lue C.S., Wang L.M., Lin J.W., Rule K.C., Gardner J.S.
Abstract
In this paper we report the resistivity and neutron scattering experiments on Nd3Co4Sn13. These results indicate that Nd3Co4Sn13 undergoes a structural distortion from a high-temperature primitive cubic unit cell to an I-centered superstructure and a concomitant doubling of the lattice constant. The P m -3 n structure of Yb3Rh4Sn13 describes well the neutron powder diffraction pattern collected at room temperature, but failed to fit the low–temperature profiles due to the presence of (h/2 k/2 l)-type diffraction peaks. Single crystal elastic neutron scattering performed in the [h h l] scattering plane shows the lattice distortion with mean field character at 124 (2) K as the temperature is lowered. Besides, three I-centered space groups are excluded by the single crystal diffraction work, including I -4 3 d symmetry which is observed in other R3T4Sn13 compounds. ? 2017 Elsevier B.V.
Subjects
Cobalt alloys; Crystal symmetry; Diffraction; Intermetallics; Neodymium alloys; Neutron scattering; Rhodium alloys; Single crystals; Temperature; Ternary alloys; Ytterbium alloys; Diffraction peaks; Elastic neutron scattering; Lattice distortions; Neutron scattering experiments; Second-order distortion; Single-crystal diffraction; Stannide; Structural distortions; Tin alloys
SDGs
Type
journal article