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Comment on "Hole digging in ensembles of tunneling molecular magnets"

J. J. Alonso·J. F. Fernandez
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Abstract

Tupitsyn et al. [Phys. Rev. B v69, 132406 (2004)] have recently reported results for the relaxation of crystalline systems of single--molecule magnets, such as Fe_8. They claim that, quite generally, (1) the magnetization and hole widths of field--distributions evolve with time t as sqrt{t}, and (2) the holes' line shapes are Lorentzian. We give a counter--example to these conclusions, and show that the main assumption on which they rest is invalid.

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J. J. Alonso, J. F. Fernandez. 2005-06-14. Comment on "Hole digging in ensembles of tunneling molecular magnets". https://doi.org/10.1103/physrevb.72.026401

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