Direct measurement of the tunneling rate of the magnetization in Fe8 via 57Fe nuclear spin-lattice relaxation by strong collision

S. H. Baek, F. Borsa, Y. Furukawa +3

${}^{57}$Fe and ${}^1$H relaxation measurements have been performed in single crystal and oriented powder of enriched ${}^{57}$Fe8 molecular cluster in the temperature range 0.05--1.7 K…