51. Antiferromagnetic ordering in the plumbide EuPdPb
- Author
-
Steffen Klenner, Lukas Heletta, Rainer Pöttgen, and Theresa Block
- Subjects
Magnetic moment ,Chemistry ,Magnetism ,chemistry.chemical_element ,General Chemistry ,010402 general chemistry ,010403 inorganic & nuclear chemistry ,01 natural sciences ,Magnetic susceptibility ,0104 chemical sciences ,Crystallography ,Mössbauer spectroscopy ,Antiferromagnetism ,Europium ,Critical field ,Hyperfine structure - Abstract
The plumbide EuPdPb was synthesized in polycrystalline form by reaction of the elements in a sealed niobium ampoule in a muffle furnace. The structure was refined from single-crystal X-ray diffractometer data: TiNiSi type, Pnma, a=752.4(2), b=476.0(2), c=826.8(2) pm, wR2=0.0485, 704 F 2 values and 20 variables. The europium atoms are coordinated by two tilted and puckered Pd3Pb3 hexagons (280–289 pm Pd–Pb) with pronounced Eu–Pd bonding (312–339 pm). Temperature-dependent magnetic susceptibility measurements show Curie-Weiss behaviour and an experimental magnetic moment of 7.35(1) μB per Eu atom. EuPdPb orders antiferromagnetically at T N=13.8(5) K and shows a metamagnetic transition at a critical field of 15 kOe. 151Eu Mössbauer spectra confirm divalent europium (δ=–10.04(1) mm s−1) and show full magnetic hyperfine field splitting (B hf=21.1(1) T) at 6 K.
- Published
- 2017