Magnetic properties of RTiGe compounds

Magnetic properties of RTiGe (R = Gd, Tb, Dy, Ho, Er, Tm, Y) compounds with CeFeSi-type structure have been studied by magnetization measurements in the temperature range 77-700 K in static magnetic fields up to 13 kOe. For TbTiGe, DyTiGe and HoTiGe the measurements have been carried on single-crystal samples. The coexistence of strong ferro-and antiferromagnetic interactions was found in RTiGe rare-earth compounds with low concentration of 3d electrons. The concentration dependencies of magnetic ordering temperatures, effective magnetic moments and paramagnetic Curie temperatures of these compounds have been determined. GdTiGe and TbTiGe orders at rather high temperatures, T-N = 412 and 288 K correspondingly, while ErTiGe and TmTiGe remain Curie-Weiss paramagnets down to 77 K. YTiGe is Pauli paramagnetic. The results are compared with those obtained on pure rare-earth elements and isotypic RTX compounds. (C) 1998 Elsevier Science B.V. All rights reserved.