Dipolar-controlled spin tunneling and relaxation in molecular magnets

Details Dipolar-controlled spin tunneling and relaxation in molecular magnets Dipolar-controlled spin tunneling and relaxation in molecular magnets

2011-10-13

arxiv.org/abs/1110.2936v2

Physics

Condensed Matter

Statistical Mechanics

10 pages, 9 figures, to be published in EPJB

Scientific paper

Spin tunneling in molecular magnets controlled by dipole-dipole interactions (DDI) in the disordered state has been considered numerically on the basis of the microscopic model using the quantum mean-field approximation. In the actual case of a strong DDI spin coherence is completely lost and there is a slow relaxation of magnetization, described by t^{3/4} at short times. Fast precessing nuclear spins, included in the model microscopically, only moderately speed up the relaxation.

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