A microscopic model of the molecular magnet V15 is used to study mechanisms for the adiabatic change of the magnetization in time-dependent magnetic fields. Effects of the Dzyaloshinskii-Moriya interaction, the most plausible source for the energy-level repulsions that lead to adiabatic changes of the magnetization, are studied in detail. We find that the energy-level repulsions that result from this interaction exhibit a strong dependence on the direction of the applied field. We also discuss the role of magnetic anisotropy in the molecule Mn12 -acetate.
@article{arxiv.cond-mat/0312581,
title = {Microscopic origin of the adiabatic change of magnetization in molecular magnets},
author = {H. De Raedt and S. Miyashita and K. Michielsen and M. Machida},
journal= {arXiv preprint arXiv:cond-mat/0312581},
year = {2007}
}