Spin transitions in a series of Fe-II molecular complexes induced by a strong-pulsed magnetic field

We report on the first comparative investigations of Fe-II spin-crossover c omplexes under high-pulsed magnetic fields near the transition temperature T-c. A partial irreversible triggering of the spin conversion is evidenced when the magnetic field is applied at a temperature belonging to the heatin g branch of the thermal hysteresis. A strong correlation between the streng th of the cooperative interactions and the kinetic character of the spin co nversion process is demonstrated. (C) 2001 Elsevier Science B.V. All rights reserved.