Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Field-dependent anisotropic magnetoresistance and planar Hall effect in
  epitaxial magnetite thin films   A systematic study of the temperature and magnetic field dependence of the
longitudinal and transverse resistivities of epitaxial thin films of magnetite
(Fe3O4) is reported. The anisotropic magnetoresistance (AMR) and the planar
Hall effect (PHE) are sensitive to the in-plane orientation of current and
magnetization with respect to crystal axes in a way consistent with the cubic
symmetry of the system. We also show that the AMR exhibit sign reversal as a
function of temperature, and that it shows significant field dependence without
saturation up to 9 T. Our results provide a unified description of the
anisotropic magnetoresistance effects in epitaxial magnetite films and
illustrate the need for a full determination of the resistivity tensor in
crystalline systems.

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The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
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The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol