One-Dimensional Chain of Tetranuclear Manganese Single-Molecule Magnets

A one-dimensional chain of interconnected single-molecule magnets (SMMs) is obtained that consists of [Mn4(hmp)6]4+ units bridged by chloride ions. Slow magnetization relaxation is evident in the AC susceptibility data and in magnetization hysteresis measurements for [Mn4(hmp)6Cl2]n(ClO4)2n. The magnetization hysteresis loops for this complex are similar to those for an SMM and show significant coercive field and steps at regular magnetic intervals. Spin-canted antiferromagnetic coupling due to misalignment of easy axes of neighboring Mn4 units is also observed for this complex.