Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stable room-temperature ferromagnetic phase at the FeRh(100) surface   Interfaces and low dimensionality are sources of strong modifications of
electronic, structural, and magnetic properties of materials. FeRh alloys are
an excellent example because of the first-order phase transition taking place
at $\sim$400 K from an antiferromagnetic phase at room temperature to a high
temperature ferromagnetic one. It is accompanied by a resistance change and
volume expansion of about 1\%. We have investigated the electronic and magnetic
properties of FeRh(100) epitaxially grown on MgO by combining spectroscopies
characterized by different probing depths, namely X-ray magnetic circular
dichroism and photoelectron spectroscopy. We thus reveal that the symmetry
breaking induced at the Rh-terminated surface stabilizes a surface
ferromagnetic layer involving five planes of Fe and Rh atoms in the nominally
antiferromagnetic phase at room temperature. First-principles calculations
provide a microscopic description of the structural relaxation and the electron
spin-density distribution that fully support the experimental findings.

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The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math