Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magneto-optical granulometry: on the determination of the statistics of
  magnetically induced particle chains in concentrated ferrofluids from linear
  dichroism experiments   An analytical theoretical model for the influence of the magnetically induced
nanoparticle chaining on the linear dichroism in ferrofluids was developed. The
model is based on a statistical theory for magnetic nanoparticle chaining in
ferrofluids. Together with appropriate experimental approach and data
processing strategy, the model grounds a magneto-optical granulometry method
able to determine the magnetic field dependence of the statistics of
magnetically induced particle chains in concentrated ferrofluids.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc