NUKLEONIKA 2007, 52(Supplement 1):S63-S66

119Sn HYPERFINE INTERACTIONS IN REAuSn (RE = RARE EARTH)

Kazimierz Łątka1, Jacek Gurgul2

1 The Marian Smoluchowski Institute of Physics, Jagiellonian University, 4 Reymonta Str., 30-059 Kraków, Poland
2 Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 8 Niezapominajek Str., 30-239 Kraków, Poland

Intermetallic REAuSn (RE = rare earth elements) compounds were studied by means of X-ray diffraction (XRD), magnetic measurements and 119Sn Mössbauer spectroscopy. It was shown that the majority of them exhibit complex antiferromagnetic ordering at low temperatures. The nature of hyperfine interactions has been discussed based on g-ray absorption spectroscopy together with magnetic and structural data. Lanthanide contraction is reflected in the lattice parameters and isomer shifts. Strong experimental arguments support correlation between crystallographic type of structure and magnetic disordering in investigated compounds.