Magnetic and crystallographic characteristics of Th6–xYxMn23 alloys

Crystallographic studies of Th_6–xY_xMn₂₃ ternaries show that Y₆Mn₂₃ and Th₆Mn₂₃ are miscible in all proportions with lattice parameters that are essentially independent of composition. Magnetic properties of the ternaries have been examined over the temperature range 4 to 500 K. The Curie temperatures and the saturation magnetizations decrease monotonically with decreasing Y content; magnetic ordering is observed for all compositions within the range 1.50 < x ? 6. Since the Mn-Mn spacing is nearly invariant with composition, it follows that electron concentration variation is responsible for the compositional variation of magnetic properties.