Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Roles of heating and helicity in ultrafast all-optical magnetization
  switching in TbFeCo   Using time-resolved magneto-optical Kerr effect (TR-MOKE) method,
helicity-dependent all-optical magnetization switching (HD-AOS) is observed in
ferrimagnetic TbFeCo films. The thermal effect and opto-magneto effects are
separately justified after single circularly polarized laser pulse. The
integral evolution of this ultrafast switching is characterized on different
time scales and the defined magnetization reversal time of 460 fs is the
fastest ever observed. Combining the heat effect and inverse Faraday effect
(IFE), micromagnetic simulations based on a single macro-spin model are
performed that reproduce HD-AOS following a linear reversal mechanism.

37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess