SPIN-GLASS BEHAVIOR IN URH2GE2

URh2Ge2 occupies an extraordinary position among the 122 heavy-electro n compounds. Its physical properties strongly deviate from those of th e other members of this materials class by exhibiting some previously unidentified form of magnetic correlations at low temperatures, instea d of the usual antiferromagnetic ground state. Here, we present new re sults of AC-susceptibility and neutron diffraction measurements on sin gle-crystalline as-grown URh2Ge2. These data clearly indicate that cry stallographic disorder on a local scale produces spin-glass behaviour in the sample. We therefore conclude that URh2Ge2 is a random-bond, he avy-fermion spin glass.