Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced magnetic properties in ZnCoAlO caused by exchangecoupling to Co
  nanoparticles   Wereport the results of a sequence of magnetisation and magneto-optical
studies on laser ablated thin films of ZnCoAlO and ZnCoO that contain a small
amount of metallic cobalt. The results are compared to those expected when all
the magnetization is due to isolated metallic clusters of cobalt and with an
oxide sample that is almost free from metallic inclusions. Using a variety of
direct magnetic measurements and also magnetic circular dichroism we find that
there is ferromagnetism within both the oxide and the metallic inclusions, and
furthermore that these magnetic components are exchange-coupled when aluminium
is included. This enhances both the coercive field and the remanence. Hence the
presence of a controlled quantity of metallic nanoparticles in ZnAlO can
improve the magnetic response of the oxide, thus giving great advantages for
applications in spintronics.

28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
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The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph