MAGNETIC PROPERTIES OF THE SPIN GLASS PRAU2SI2

Abstract We examined the magnetic properties of pure PrAu 2 Si 2 and present results of linear and nonlinear magnetic susceptibility measurements. The data show the characteristic features of a canonical spin glass, e.g. the critical behavior of the nonlinear susceptibility at the glass transition and the frequency dependence of the complex linear susceptibility near the freezing temperature, which is determined near T F ≈3 K . It is the first time that spin glass behavior was found in a pure rare-earth compound with well-localized magnetic moments.