Multiple magnetic-pole reversals in the molecular-based mixed-valency ferrimagnet {[N(n-C4H9)4][FeFe(C2O4)3]}n

Warming-mode magnetic measurements of the molecular-based ferrimagnet {[N(n-C4H9)4][FeFe(C2O4)3]}n were carried out in a field of 0.5 kOe from 5 K up to room temperature. Multiple magnetic-pole reversals and a two-compensation-points phenomenon were observed in the material. We can explain the observed multiple magnetic-pole reversals in terms of a combination of molecular-field theory and the coercive field.