Abstract
Unusual magnetic properties of non-magnetic atom disorder compound Dy 2 PdSi 3 have been investigated by ac susceptibility, dc magnetization, magnetic relaxation, specific heat and electrical resistivity measurements. The temperature dependences of ac susceptibility and dc magnetization show two maxima at T N = 7.7 K and T f ∼2.6 K, respectively. The first peak at T N is attributed to a long-range antiferromagnetic ordering and the second one reveals the formation of a spin-glass state, which is also confirmed by the thermomagnetic irreversibility and long-time magnetic relaxation phenomenon observed at an applied magnetic field much larger than its coercive field. Moreover, the absence of any anomaly in both specific heat and electrical resistivity around T f gives further evidence for the spin-glass state.
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