Sheila M. J. Aubin, David N. Hendrickson, Sheila M. J. Aubin, Stefano Spagna, Hilary J. Eppley, Ronald E. Sager, Hilary J. Eppley and George Christou
Steps are observed on the magnetization hysteresis loop for an oriented crystal sample of [PPh4][Mn12O12(O2CEt)16- (H2O)4] and these are taken as evidence for field-tuned resonant magnetization tunnelling between quantum levels of the S = 19/2 ground state.