The Co59 nuclear magnetic resonances in (Ysub(1-x)Gdsub(x))2Co17

The nuclear magnetic resonances of Co59 in (Ysub(1-x)Gdsub(x))2Co17 have been observed at 77 K as a function of x (0<=x<=1). The difference in resonance frequencies between Y2Co17 and Gd2Co17 is at most 7 kOe in magnitude, which is comparable to that obtained in GdCo5. The sign of the obtained difference depends on the Co sites. The difference is qualitatively explained as the contribution of 4f electrons of Gd atoms to the hyperfine field. The temperature dependence of the resonance frequencies in Gd2Co17 has also been measured. (auth.)