Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant third-order magneto-optical rotation in ferromagnetic EuO   A magnetization-induced rotation in the third-order nonlinear optical
response is observed in out-of-plane-magnetized epitaxial EuO films. We discuss
the relation of this nonlinear magneto-optical rotation to the linear Faraday
rotation. It is allowed in all materials but, in contrast to the linear Faraday
rotation, not affected by the reduction of the thickness of the material. Thus,
the third-order magneto-optical rotation is particularly suitable for probing
the magnetization of functional magnetic materials such as ultra-thin films and
multilayers.

16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math