Neutron diffraction and magnetometric data show that RAuSn compounds (
R=Gd-Ho) with the hexagonal LiGaGe-type crystal structure order antife
rromagnetically at low temperatures. Their magnetic structures are des
cribed by the wave vector k=[1/2,0,0]; the magnetic moments are normal
to the hexagonal axis in TbAuSn and DyAuSn and parallel to it in HoAu
Sn. ErAuSn is cubic (MgAgAs-type of crystal structure). The long range
magnetic ordering is not observed at T=1.6 K. (C) 1998 Elsevier Scien
ce S.A.