MAGNETIC-PROPERTIES OF THE CEFESI-TYPE PRRUSI AND PRRUGE COMPOUNDS

The magnetic properties of the tetragonal CeFeSi-type compounds PrRuSi and PrRuGe have been investigated by susceptibility measurements and neutron diffraction. They order antiferromagnetically below T-N=73 and 62 K respectively. Neutron diffraction experiments show that both com pounds have the collinear antiferromagnetic structure which consists o f ferromagnetic (001) Pr layers (with moments perpendicular to the lay ers) antiferromagnetically coupled along the c-axis in the sequence +- + (mu(Pr) = 2.67(4) and 2.39(3) mu(B) for PrRuSi and PrRuGe respective ly). The results are compared with those obtained on the isotype RTX ( R=rare earth; T=Fe Co Ru) silicides and germanides. Copyright (C) 1996 Elsevier Science Ltd