The role of S mixing in the quantum tunneling of the magnetization in nanomagnets has been investigated. We show that the effect on the tunneling frequency is huge and that the discrepancy (more than 3 orders of magnitude in the tunneling frequency) between spectroscopic and relaxation measurements in Fe8 can be resolved if S mixing is taken into account.
S mixing and quantum tunnelling of the magnetization in molecular nanomagnets / S. CARRETTA; E. LIVIOTTI; N. MAGNANI; P. SANTINI; AMORETTI G.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 92(2004), pp. 207205-1-207205-4. [10.1103/PhysRevLett.92.207205]
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