Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of coherent radiation by magnetization reversal in graphene   Local magnetic moments can be created in graphene by incorporating different
defects. The possibility of regulating dynamics of magnetization in graphene,
by employing the Purcell effect, is analyzed. The role of the system parameters
in magnetization reversal is studied. The characteristics of such a reversal
can be varied in a wide range, which can be used for various applications in
spintronics. It is shown that fast magnetization reversal generates coherent
radiation.

30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn