Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ab-inito study on different phases of ferromagnetic CeMnNi4   Using first-principles density functional calculations, we study the possible
phases of CeMnNi$_{4}$ and show that the ground state is ferromagnetic. We
observed the hexagonal phase to be lowest in energy whereas experimentally
observed cubic phase lies slightly higher in energy. We optimized the structure
in both phases and in all different magnetic states to explore the possibility
of the structural and magnetic phase transitions at ground state. We do not
find any phase transitions between the magnetic and non-magnetic phases. The
calculated structural, magnetic properties of cubic phase are in excellent
agreement with experiments. Further, we do not observe half metallic behavior
in any of the phases. However, the cubic phase does have fewer density of
states for down-spin component giving a possibility of forming half metallic
phase artificially, introducing vacancies, and disorder in lattice.

25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th