Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High ferromagnetic phase transition temperatures in GaMnAs layers
  annealed under arsenic capping   Thin GaMnAs layers grown by molecular beam epitaxy were subjected to
low-temperature post growth annealing, with an amorphous arsenic capping layer
deposited on the GaMnAs surface directly after the epitaxial growth. It is
shown that the presence of arsenic capping at the GaMnAs surface significantly
shortens the post-growth annealing times and facilitates a complete
out-diffusion of Mn interstitials from GaMnAs volume.

16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys