Magnetic ordering of TbTSb2 (T = Cu, Pd, Ag) compounds

RTSb2 (T = Cu, Pd, Ag) compounds crystallize in the tetragonal ZrCuSi2-type of crystal structure and are antiferromagnets with a Neel temperatures 9 K far T = Cu, 11 K for T = Pd and Ag. In TbCuSb2 the magnetic ordering is co llinear described by the propagation Vector k = (1/2, 0, 0). With an increa sing temperature the change of the magnetic structure to a sine modulated o ne is observed. The magnetic structure of the TbPdSb2 is described by the p ropagation vector k = (0.577, 0, 1/2). The TbAgSb2 shows a collinear magnet ic ordering described by the propagation vector k = (1/2, 0, 0). (C) 2000 E lsevier Science B.V. All rights reserved.