On the origin of non-Markovian kinetics of light-induced magneto-structural relaxation in “breathing” crystals
V. A. Morozov
Российский химический вестник
https://doi.org/10.1007/s11172-022-3541-z
Traditional mean-field theory of light-induced magneto-structural relaxation in spin-crossover compounds provides a qualitatively correct explanation for the non-Markovian self-accelerating character of the experimentally observed kinetics of the process. The relaxation kinetics of “breathing” crystals is often also of non-Markovian character, being, however, self-decelerating. In this work the self-decelerating kinetics of light-induced magneto-structural relaxation is explained using a kinetic analysis of the concentration profile of photoexcited Jahn—Teller exchange clusters in “breathing” crystals of finite thickness. The results obtained are also equally applicable to the kinetics of light-induced relaxation of classical spin-crossover systems.
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