Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the geometric and magnetic properties of the monomer, dimer and
  trimer of NiFe2O4   In this work, by employing Density Functional Theory, we compute and discuss
some geometric and magnetic properties of the monomer, dimer and trimer of
NiFe2 O4 . The calculations are performed at the UDFT/ B3LYP level of
calculation, by employing the LANL2DZ effective pseudo potential. The results
of the Mulliken spin densities and the spin polarization will be presented.
Finally the outcome of the system density of states is considered.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics