Nuclear Quadrupole Resonance Measurement of the Ferromagnetic Filled-Skutterudite Compound EuRu₄Sb₁₂

Abstract

We report the detailed analysis of the 101 Ru nuclear quadrupolar resonance spectrum in the ferromagnetically ordered state of EuRu 4 Sb 121 and propose that Eu 4f moments align in the [111] direction. The localized character of Eu 4f electrons is suggested from the temperature dependence of the nuclear spin-lattice relaxation rate.