Magnetic and crystallographic characteristics of Thsub(6-x)Ysub(x)Mn23 alloys

Crystallographic studies of Th6sub(x)Ysub(x)Mn23 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. (orig.)