Theory of magnetic deflagration

Details Theory of magnetic deflagration Theory of magnetic deflagration

2007-04-27

arxiv.org/abs/0704.3751v1

Phys. Rev. B 76, 054410 -(13) (2007)

Physics

Condensed Matter

Statistical Mechanics

17 Pages, 17 Figure captions

Scientific paper

10.1103/PhysRevB.76.054410

Theory of magnetic deflagration (avalanches) in crystals of molecular magnets has been developed. The phenomenon resembles the burning of a chemical substance, with the Zeeman energy playing the role of the chemical energy. Non-destructive reversible character of magnetic deflagration, as well as the possibility to continuously tune the flammability of the crystal by changing the magnetic field, makes molecular magnets an attractive toy system for a detailed study of the burning process. Besides simplicity, new features, as compared to the chemical burning, include possibility of quantum decay of metastable spin states and strong temperature dependence of the heat capacity and thermal conductivity. We obtain analytical and numerical solutions for criteria of the ignition of magnetic deflagration, and compute the ignition rate and the speed of the developed deflagration front.

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