Temperature induced transition in one-dimensional molecular magnets

The temperature induced transition in one-dimensional bistable molecular magnetic systems with degenerate states is discussed. This phenomenon derives from the existence of two stable spin configurations in transition metallic ion, separated by an energy gap, that determines a certain spin state. A new microscopic model is proposed in order to account for the variation of molecular size in observed magnetic states. The behavior of 1D bistable molecular chain considering both structural and magnetic properties have been studied in framework of simple conception in which the molecules are strongly fixed on chain’s sites and are connected by springs.