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Dipolar-controlled spin tunneling and relaxation in molecular magnets

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Abstract

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, coherence of spin tunneling 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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Authors and Affiliations

  1. Department of Physics and Astronomy, Lehman College, City University of New York, 250, Bedford Park Boulevard West, Bronx, 10468, New York, USA

    D. A. Garanin

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  1. D. A. Garanin
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Correspondence to D. A. Garanin.

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Garanin, D.A. Dipolar-controlled spin tunneling and relaxation in molecular magnets. Eur. Phys. J. B 85, 107 (2012). https://doi.org/10.1140/epjb/e2012-20835-6

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  • DOI: https://doi.org/10.1140/epjb/e2012-20835-6

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