Decay of time-correlations of microscopic observables in magnetic molecules

摘要: Abstract We derive a general expression for the quasielastic part of dynamic structure factor in presence heat bath, starting from master equation applied to full microscopic Hamiltonian. By specializing this case total spin, we investigate time autocorrelation molecular magnetization M three classes magnetic molecules (antiferromagnetic rings, grids and nanomagnets), contact with phonon bath. find that exponential decay fluctuations , associated irreversible exchange energy is characterized by single not too high temperature field. Such are effectively probed nuclear resonance (NMR), calculations very good agreement existing experimental NMR data.