Metamagnetic magnetization in DyCu₂

We have observed two metamagnetic transitions in the field along the c-axis in DyCu₂, which occurs at 8 and 14 T at 1.3 K. A higher field transition corresponds to the previous data obtained by Hashimoto et al. [5] and decreases as the temperature increases up to the Néel temperature T_N, while a lower field transition shows no temperature dependence and disapears above T_N. The former transition field increases linearly as the temperature increases above T_N. This temperature dependence is similar to that in PrCu₂ of which the metamagnetic transition is based on the quadrupole moment.