Spin-glass-like behavior in very dilute pdFe at very low temperatures

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. © 1983 The American Physical Society.