Neutron diffraction and magnetic studies of the NdRh2-xRuxSi2 system

The magnetic (x,T) phase diagram of the solid solution NdRh2-xRuxSi2 (ThCr2 Si2-type of crystal structure) has been established based on the neutron di ffraction data and supplemented by magnetometric data. A collinear antiferr omagnetic order AFI described by the wave vector k=(0,0,1) changes with an increase of Ru concentration to a sine modulated with the wave vector k=(0, 0,k(2)). For x=1.6 ferromagnetic order is observed. In the region 1.7 less than or equal to x less than or equal to 2.0 the ferromagnetic order at low temperatures changes with increasing temperature to a sine modulated struc ture described by the wave vector k=(k(x),k(x),0). (C) 2000 Elsevier Scienc e S.A. All rights reserved.