Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A pulsating regime of magnetic deflagration   The stability of a magnetic deflagration front in a collection of molecular
magnets, such as Mn_12-acetate, is considered. It is demonstrated that
stationary deflagration is unstable with respect to one-dimensional
perturbations if the energy barrier of the magnets is sufficiently high in
comparison with the release of Zeeman energy at the front; their ratio may be
interpreted as an analogue to the Zeldovich number, as found in problems of
combustion. When the Zeldovich number exceeds a certain critical value, a
stationary deflagration front becomes unstable and propagates in a pulsating
regime. Analytical estimates for the critical Zeldovich number are obtained.
The linear stage of the instability is investigated numerically by solving the
eigenvalue problem. The nonlinear stage is studied using direct numerical
simulations. The parameter domain required for experimental observations of the
pulsating regime is discussed.

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The categories of this paper are: math
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th