Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First-principles studies of modulated Co/Cu superlattices with strongly
  and weakly exchange-biased Co-monolayers leading to a ferrimagnetic ground
  state   First-principles calculations have been performed in order to determine
effective exchange integrals between strongly and weakly exchange-biased Co
monolayers in the modulated CoCu$_2$/CoCu$_n$ superlattices. For $3\le n\le 6$
it has been found that the respective exchange integrals have opposite signs
and differ for $n\ne 4$ from each other by one order of magnitude and for $n=4$
still by a factor of $\sim 1.7$. The obtained phase diagram, with all the
relevant magnetic phases, shows that for the $n$-values considered, the ground
state configuration is ferrimagnetic.

26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio