SPIN EXCITATIONS OF CEPD2IN AT LOW-TEMPERATURES

We have measured In-115 nuclear magnetic resonance spectra and the spi n-lattice relaxation rate T-1(-1) of CePd2In at temperatures between 0 .03 K and 30 K, for various frequencies and fields. The temperature de pendence of the NMR spectrum indicates the onset of an antiferromagnet ic phase below 1.2 K. We find that the magnetic structure is formed by small localized Ce moments of 0.11 mu(B), which suggests substantial Kondo screening of the 4f electrons. The temperature dependence of the spin-lattice relaxation rate T-1(-1)(T) indicates the presence of low -energy electronic excitations below 0.6 K. Its field dependence T-1(- 1)(H) shows that both the Kondo screening and the antiferromagnetic or der are suppressed by the application of fields of the order of three Tesla.