NMR Study of RERh₄B₄ (RE=Rare Earth)

抄録

Pulsed NMR study has been performed in RERh₄B₄ (RE=rare earth). We obtained the conduction electron spin polarization at B site from the isotropic Knight shift of ¹¹B. The isotropic shift is proportional to (g_J−1)⁄g_J, which means J_sfN_s(E_F) is nearly same for all RERh₄B₄ compounds. The nuclear spin lattice relaxation time, T₁ of ⁸⁹Y and ¹⁰³Rh were measured in YRh₄B₄ and LuRh₄B₄. The density of state at the Fermi level in each atomic site is evaluated from T₁. The agreement of the results with the recent band calculation is satisfactory. The isotropic shift of ¹⁰³Rh is measured in SmRh₄B₄.