Hyperfine interactions studied by 119Sn Mössbauer spectroscopy in TbAuSn and TmAuSn compounds

X-ray diffraction, magnetic susceptibility measurements and 119Sn Mössbauer spectroscopy were used to study structure and hyperfine interactions in intermetallic TbAuSn and TmAuSn compounds. It was shown that the first compound orders antiferromagnetically at low temperatures with Tb magnetic moments inclined at an angle of about 25° to the crystallographic c-axis. The second compound stays non-magnetic in the whole measured region. The occurrence of a magnetic hyperfine field distribution in TbAuSn suggests that this compound crystallizes in the disordered CaIn2-type of structure.