Macroscopic measurement of resonant magnetization tunneling in high-spin molecules.

@article{Friedman1996MacroscopicMO,
  title={Macroscopic measurement of resonant magnetization tunneling in high-spin molecules.},
  author={Friedman and Sarachik and Tejada and Ziolo},
  journal={Physical review letters},
  year={1996},
  volume={76 20},
  pages={3830-3833}
}
We report the observation of steps at regular intervals of magnetic field in the hysteresis loop of a macroscopic sample of oriented Mn 12O12(CH3COO)16(H2O)4 crystals. The magnetic relaxation rate increases substantially when the field is tuned to a step. We propose that these effects are manifestations of thermally assisted, field-tuned resonant tunneling between quantum spin states, and attribute the observation of quantum-mechanical phenomena on a macroscopic scale to tunneling in a large… CONTINUE READING

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