Crystal structure and magnetic and electrical properties of pseudo-ternary DyCu/sub 1-x/Zn/sub x/Si compounds

The pseudo-ternary DyCu/sub 1-x/Zn/sub x/Si (0 =< x =< 1) compounds are synthesized. The crystal structure of these solid solutions is the hexagonal AlB2-type structure. From the results of electrical resistivity measurements, it is found that these compounds are metallic and the temperature coefficient, drho/dT, decreased with increasing x. The results of magnetic measurements show that all these compounds are paramagnetic above 77 K, and the magnetization and paramagnetic Curie temperatures have the maximum values at x = 0.4 in DyCu/sub 1-x/Zn/sub x/Si. It is expected that the electrical and magnetic properties of DyCu/sub 1-x/Zn/sub x/Si are strongly dependent on the concentration of conduction electrons. (author)