Counterpart of the Darrieus-Landau instability at a magnetic deflagration front
Artikel i vetenskaplig tidskrift, 2016

The magnetic instability at the front of the spin avalanche in a crystal of molecular magnets is considered. This phenomenon reveals similar features with the Darrieus-Landau instability, inherent to classical combustion flame fronts. The instability growth rate and the cutoff wavelength are investigated with respect to the strength of the external magnetic field, both analytically in the limit of an infinitely thin front and numerically for finite-width fronts. The presence of quantum tunneling resonances is shown to increase the growth rate significantly, which may lead to a possible transition from deflagration to detonation regimes. Different orientations of the crystal easy axis are shown to exhibit opposite stability properties. In addition, we suggest experimental conditions that could evidence the instability and its influence on the magnetic deflagration velocity.

Författare

O. Jukimenko

M. Modestov

C. M. Dion

Mattias Marklund

Chalmers, Fysik, Teoretisk fysik

V. Bychkov

Physical Review B: covering condensed matter and materials physics

2469-9969 (eISSN)

Vol. 93 134418-

Fundament

Grundläggande vetenskaper

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.93.134418

Mer information

Skapat

2017-10-07