tunneling of the magnetization through an anisotropy barrier

L. Thomas, F. Lionti, R. Ballou, D. Gatteschi, R. Sessoli, and B. Barbara, Nature 383, 145-147 (1996).

C. Sangregorio, T. Ohm, C. Paulsen, R. Sessoli, and D. Gatteschi, Phys. Rev. Lett. 78, 4645-4648 (1997)

Further reading: D. Gatteschi, R. Sessoli, and J. Villain, Molecular Nanomagnets, Oxford University Press, Oxford (2006).

observation of quantum interference

W. Wernsdorfer and R. Sessoli, Science 284, 133 (1999)