¹⁵⁹Tb NMR in TbNi₃ and Related Compounds

Abstract

¹⁵⁹Tb spin echo NMR measurements have been done on TbNi₃, Tb_1−xY_xNi₃ for x≤0.4, Tb(Ni_1−xCu_x)₃ for x≤0.1 and Tb(Ni_0.96Al_0.04)₃. The NMR spectrum becomes rather broad with substituting Ni by Cu, while that for Tb(Ni_0.96Al_0.04)₃ shows a well-resolved satellite structure. The magnetic moment of Tb in TbNi₃ is deduced to be 8.1 μ_B for site I and 7.8 μ_B for site II from an analysis of the electric quadrupole interaction of ¹⁵⁹Tb on the basis of a molecular field Hamiltonian.