Nuclear Magnetic Resonance Study of YCo₃

Abstract

The nuclear magnetic resonance of ⁵⁹Co nuclei in magnetic domains of YCo_3−xNi_x (0≤x≤1) has been measured under external magnetic fields up to 55 kOe at 4.2 K. The hyperfine fields at the 3b, 6c and 18h sites in YCo₃ are found to be 35 kOe, 61 kOe and −42 kOe, respectively. The nuclear magnetic resonance of YCo_3−xNi_x with x=0.65, 0.8 and 1.0 under external magnetic fields shows a nearly paramagnetic state of Co atoms. Consistently, the magnetic moment of these compounds rapidly drops down around these concentrations.