Magnetic structures of Ce2Pd1−xCoxSi3 (x = 0.0, 0.2, 0.4, 0.6) compounds
摘要
Polycrystalline samples of Ce2Pd1−xCoxSi3 for x equal to 0.0, 0.2, 0.4 and 0.6 have been studied by neutron diffraction. All these compounds exhibit a hexagonal crystal structure of the AlB2-type. In Ce2PdSi3 below 3.5K, features attributable to short-range magnetic order are observed. The neutron diffraction patterns for the other compositions are typical of simple magnetic structures described by an orthorhombic unit cell (a, √3a, c).The magnetic moment at low temperatures equals 0.37(14)μB at 1.6K for x=0.2, 1.27(5)μB at 1.6K for x=0.4 and 0.55(8)μB at 1.85K for x=0.6. The moments are parallel to the b-axis of the orthorhombic magnetic unit cell.