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…
67 Citations
Magnetic Quantum Tunneling in the Single-Molecule Magnet Mn12-Acetate
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- 2005
The symmetry of magnetic quantum tunneling (MQT) in the single molecule magnet Mn2-acetate has been determined by sensitive low-temperature magnetic measurements in the pure quantum tunneling regime…
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- Physics
- 2002
We have studied the escape rate of spin tunneling in a molecular magnet with a fourfold easy axis, such as Mn12-acetate, in the presence of an external field applied perpendicular to the easy axis.…
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- 2011
Abstract
The crossover of the escape rate between thermally assisted and pure quantum tunneling is studied in biaxial magnetic nanoparticles with a high symmetry. The sequential crossover occurs in…
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- 2001
We investigate the quantum-classical crossover of the escape rate in the nanoscale ferromagnetic particle with complex crystal symmetries placed in an external field along the hard anisotropy axis.…
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- 2003
Field-tuned quantum tunneling of the supramolecular magnet [Mn 4 ] 2 is studied. It is a dimer constructed by two single-molecular clusters, Mn 4 (S=9/2), coupled antiferromagnetically. By means of…
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