Tupitsyn et al. [Phys. Rev. B v69, 132406 (2004)] have recently reportedresults for the relaxation of crystalline systems of single--molecule magnets,such as Fe_8. They claim that, quite generally, (1) the magnetization and holewidths of field--distributions evolve with time t as sqrt{t}, and (2) theholes' line shapes are Lorentzian. We give a counter--example to theseconclusions, and show that the main assumption on which they rest is invalid.
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机译：Tupitsyn等。 [物理B v69，132406（2004）（Rev. B v69，132406（2004））最近报告了松弛单分子磁体（例如Fe_8）的晶体系统的结果。他们声称，通常，（1）磁场的磁化强度和孔宽度-分布随时间t随着sqrt {t}的变化而变化，（2）孔的线形是洛伦兹式的。我们对这些结论给出一个反例，并表明它们所基于的主要假设是无效的。
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