Tuning size and magnetic thermal hysteresis in a new near room temperature spin crossover compound

A mononuclear spin crossover compound Fe(AP-Mesal)(2), which exhibits spin transitions near room temperature and light induced excited spin state trapping (LIESST) effects at low temperature, was synthesized and substructured in the form of micro-and nanoscaled particles. A thermal hysteresis loop was detected with particle size reduction to microscale and nanoscale.