S mixing and quantum tunneling of the magnetization in molecular nanomagnets.

@article{Carretta2004SMA,
  title={S mixing and quantum tunneling of the magnetization in molecular nanomagnets.},
  author={Stefano Carretta and E. Liviotti and Nicola Magnani and P M Santini and Giuseppe Amoretti},
  journal={Physical review letters},
  year={2004},
  volume={92 20},
  pages={
          207205
        }
}
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 Fe(8) can be resolved if S mixing is taken into account. 
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