Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum dissipation theory of slow magnetic relaxation mediated by
  domain-wall motion in one-dimensional chain compound [Mn(hfac)_{2}BNO_{H}}]   Based on a quantum dissipation theory of open systems, we present a
theoretical study of slow dynamics of magnetization for the ordered state of
the new molecule-based magnetic complex [Mn(hfac)_{2}BNO_{H}] composed from
antiferromagnetically coupled ferrimagnetic (5/2,1) spin chains. Experimental
investigations of the magnetization process in pulsed fields have shown that
this compound exhibits a metamagnetic AF-FI transition at a critical field in
the order of the interchain coupling. A strong frequency dependence for the
ac-susceptibility has been revealed in the vicinity of the AF-FI transition and
was associated with an AF-FI interface kink motion. We model these processes by
a field-driven domain-wall motion along the field-unfavorable chains correlated
with a dissipation effect due to a magnetic system-bath coupling. The
calculated longitudinal magnetization has a two-step relaxation after the field
is switched off and are found in good agreement with the experiment. The
relaxation time determined from the imaginary part of the model
ac-susceptibility agrees qualitatively with that found from the remanent
magnetization data.

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The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin