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- Title
Synthesis and magnetic properties of the extended RE<sub>4</sub>Pd<sub>9</sub>Al<sub>24</sub> series (RE = Sc, Y, Ce–Nd, Sm, Gd–Lu).
- Authors
Radzieowski, Mathis; Bönnighausen, Judith; Janka, Oliver
- Abstract
The existing RE4Pd9Al24 series (triclinic, space group P 1 ¯ $\overline{1}$ ) with RE = Gd–Tm has been extended to the rare earth elements Sc, Y, Ce–Nd, Sm, Yb and Lu. The samples were synthesized from the elements via arc-melting followed by annealing. Phase-purity was checked by powder X-ray diffraction experiments, which were also utilized to refine the lattice parameters. The structure can be described as composed of layers with a stacking of [PtAl2] (A) and [RE2Al3] (B) slabs in an ABAAB sequence. As two different structure types (P 1 ¯ $\overline{1}$ and R 3 ¯ $\overline{3}$ m) have been reported for this composition, a group-subgroup scheme using the Bärnighausen formalism has been established in order to link the two. The magnetic properties of the X-ray-pure samples were investigated by susceptibility and magnetization measurements. Gd4Pd9Al24 shows the highest transition temperature to antiferromagnetism of TN = 22.0(1) K, however, a broad feature is observed. This is in line with a low-dimensional ordering caused by the layer-like structure and the flat honeycomb arrangement of the Gd atoms.
- Publication
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, 2020, Vol 75, Issue 6, p633
- ISSN
0932-0776
- Publication type
Article
- DOI
10.1515/znb-2020-0051