Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetoresistance and magnetic anisotropy in
  La$_{0.5}$Sr$_{0.5}$CoO$_{3-\delta}$ film   The magnetic and transport properties of La$_{0.5}$Sr$_{0.5}$CoO$_{3-\delta}$
film grown on a LaAlO$_3$ substrate by pulsed-laser deposition are studied. The
properties are found to be influenced by a combined influence of the magnetic
anisotropy and inhomogeneity. Magnetoresistance anisotropy is determined by the
shape anisotropy and the strain-induced magnetic anisotropy due to the
film-substrate lattice interaction. Indications of the temperature-driven spin
reorientation transition from an out-of plane orderded state at low
temperatures to an in-plane ordered state at high temperatures as a result of
competition between the mentioned anisotropy sources are found.

2
The categories of this paper are: math
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg