Quantum Thermoactivation of Nanoscale Magnets
Statistical Mechanics
2009-10-31 v1
Abstract
The integral relaxation time describing the thermoactivated escape of a uniaxial quantum spin system interacting with a boson bath is calculated analytically in the whole temperature range. For temperatures T much less than the barrier height \Delta U, the level quantization near the top of the barrier and the strong frequency dependence of the one-boson transition probability can lead to the regularly spaced deep minima of the thermoactivation rate as a function of the magnetic field applied along the z axis.
Cite
@article{arxiv.cond-mat/9805055,
title = {Quantum Thermoactivation of Nanoscale Magnets},
author = {D. A. Garanin},
journal= {arXiv preprint arXiv:cond-mat/9805055},
year = {2009}
}
Comments
4 pages, no figures, rejected from Phys. Rev. Lett