Weak ferromagnetism and dynamic magnetic behavior in a single end-to-end azide-bridged nickel(II) chain

An isolated 1D Ni-II chain containing single end-to-end azide bridges has been constructed (see figure). The non-centrosymmetric character of the three-atom single-bridge leads to a weak ferromagnetic behavior. Surprisingly it shows a strong frequency, dependence of AC susceptibility and magnetic hysteresis loops even at 10 K.