Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AMR and magnetometry studies of ultra thin GaMnAs films   We have measured the Anisotropic Magnetoresistance (AMR) of ultra thin (5nm)
Ga(0.95)Mn(0.05)As films. We find that the sign of the AMR can be positive or
negative, which may depend on the direction of the current with respect to the
crystal. At low temperatures, transport measurements and SQUID magnetometry
suggest that the magnetisation has a component pointing out of the plane of the
film.

17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics