Spin-Glass-Like Behavior in Very DilutepdFeat Very Low Temperatures

R. A. Webb, G. W. Crabtree, J. J. Vuillemin
1979 Physical Review Letters  
Measurements of the electrical resistivity of palladium, residual resistivity ratio -22 500, containing 1.7 ppm of Fe have been made from 5.5 K to 1.8 mK. 15 Hz ac susceptibility measurements from 1 K to 1.8 mK together with the resistivity data suggest that a transition into a spin-glass state occurs near 7 mK.
doi:10.1103/physrevlett.43.796 fatcat:2zd3bmdk7fcl5kbxapk3swo5vm