Crossover between thermally assisted and pure quantum tunneling in molecular magnet Mn12-acetate

@article{Bokacheva2000CrossoverBT,
  title={Crossover between thermally assisted and pure quantum tunneling in molecular magnet Mn12-acetate},
  author={Bokacheva and Kent and Walters},
  journal={Physical review letters},
  year={2000},
  volume={85 22},
  pages={
          4803-6
        }
}
The crossover between thermally assisted and pure quantum tunneling has been studied in single crystals of high spin (S = 10) uniaxial molecular magnet Mn12 using micro-Hall-effect magnetometry. Magnetic hysteresis and relaxation experiments have been used to investigate the energy levels that determine the magnetization reversal as a function of magnetic field and temperature. These experiments demonstrate that the crossover occurs in a narrow ( approximately 0. 1 K) or broad ( approximately 1… 
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