Rare double spin canting antiferromagnetic behaviours in a [Co24] cluster

Abstract

A fish-basket-shaped [Co₂₄] cluster, [Co₂₄(μ₃-O)₄(ampc)₄(μ₃-OH)₄(μ₂-OH)₄(NO₃)₅(HCO₂)₂₂(H₂O)₁₀]·[(HCO₂)·2(CH₃OH)·x(H₂O)], was woven by bridging oxygen atoms from O²⁻, OH⁻, NO₃⁻ and HCO₂⁻ groups, and stabilized terminally by a semi-rigid organic ligand 4′,4′-[(dimethylamino)dimethylene]-bis[(1,1′-biphenyl)-2-carboxylate] (ampc⁻). Magnetic analyses indicate that the [Co₂₄] cluster exhibits two types of spin canting orders, spin flop and a small hysteresis with a coercive field of ca. 661 Oe and a remanent magnetization of 0.466 Nβ.