Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous magnetisation in a Fe_3Pt-FeRh film occurring at T~120 K in
  the field-cooled-cooling curves for low magnetic fields   We report on an anomalous magnetization observed with temperature for low
magnetic fields applied in the plane of a film formed by a thin layer of Fe-Rh
deposited on a thin foil of ordered Fe$_3$Pt. The anomalous effect resembles a
metamagnetic transition and occur only in the field-cooled-cooling
magnetization curve at temperatures near 120 K. We also observe an aging effect
which broads the metamagnetic-like transition suggesting the existence of Fe-Rh
antiferromagnetic clusters which apparently are too small to be detected by the
x-ray diffraction.The X-Ray diffractogram obtained in the Fe-Rh surface of the
film do not show the Fe-Rh antiferromagnetic phase (a=2.98 $\AA$) but peaks at
same locations of those found for the pure ordered Fe$_3$Pt film (a=3.72 $\AA$)

34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg