Localized spin fluctuations in CePd2Si2

Abstract We have studied the dynamic magnetic susceptibility in a single crystal of CePd2Si2 using inelastic neutron scattering. Above T N =8.5 K , the Kondo-type spin fluctuations are independent of the wave vector Q . There is thus no evidence for a reduced dimensionality of the magnetic response in CePd2Si2 at ambient pressure. This is in contrast to low-temperature resistivity measurements at high pressures, which suggest a 2D character of the spin fluctuations.