Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revealing the role of orbital magnetism in ultrafast laser-induced
  demagnetization in multisublattice metallic magnets by terahertz spectroscopy   Simultaneous detection of THz emission and transient magneto-optical response
is employed to study ultrafast laser-induced magnetization dynamics in
multisublattice magnets NdFeCo and GdFeCo amorphous alloys with in-plane
magnetic anisotropy. A satisfactory quantitative agreement between the dynamics
revealed with the help of these two techniques is obtained for GdFeCo. For
NdFeCo the THz emission reveals faster dynamics than the magneto-optical
response. This indicates that in addition to spin dynamics of Fe ultrafast
laser excitation triggers faster magnetization dynamics of Nd.

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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
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The categories of this paper are: math-ph
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
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The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
19
The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio