Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impact of local arrangement of Fe and Ni in Fe-Ni-Al Heusler alloys on
  the phase stability and magnetocrystalline anisotropy   On the basis of the density functional calculations in combination with the
supercell approach, we report on a complete study of the influences of atomic
arrangement and Ni substitution for Al on the ground state structural and
magnetic properties for Fe$_2$Ni$_{1+x}$Al$_{1-x}$ Heusler alloys. We discuss
systematically the competition between five cubic Heusler-type structures
formed by shuffles of Fe and Ni atoms to reveal routes for improving the phase
stability and magnetic properties, in particular magnetocrystalline
anisotropy~(MAE). We predict that in case of Fe$_2$NiAl the ground state cubic
structure with alternated layers of Fe and Ni possesses the highest uniaxial
MAE which twice larger than that for the tetragonal L1$_0$ FeNi. The successive
Ni doping at Al sublattice leads to a change of ground state structure and to
reduce of the MAE. In addition, the phase stability against the decomposition
into the stable systems at finite-temperatures is discussed. All~Ni-rich
Fe$_2$Ni$_{1+x}$Al$_{1-x}$ are turned to be decomposed into a dual-phase
consisting of Fe$_2$NiAl and FeNi.

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The categories of this paper are: acc-phys
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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: chem-ph
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The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga