Ohm, T.; Sangregorio, C.; Paulsen, C. - In: The European Physical Journal B - Condensed Matter and … 6 (1998) 2, pp. 195-199
We observed non-exponential relaxation for a quantum tunneling molecular magnetic system at very low temperatures and argue that it results from evolving intermolecular dipole fields. At the very beginning of the relaxation, the magnetization follows a square-root time dependence. A simple model...