Answers are grounded in this paper and cite their sources.
We present a comprehensive theory of the magnetization relaxation in a Mn 12 -acetate crystal based on thermally assisted spin tunneling induced by quartic anisotropy and weak transverse magnetic fields. The overall relaxation rate as a function of the magnetic field is calculated and shown to agree well with data including all resonance peaks. The Lorentzian shape of the resonances is also in good agreement with recent data. A generalized master equation including resonances is derived and solved exactly. It is shown that many transition paths with comparable weight exist that contribute to the relaxation process. Previously unknown spin-phonon coupling constants are calculated explicitly.
No takes yet. Share an insight, caveat, or question.
A 1999 study studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: