Material:

MnAs

ID:

MMD-895

Explore database:

Compounds with the same formula: MnAs (3 entries found)
Compounds with the same elements: Mn-As (10 entries found)
Navigation:
Space group | Lattice parameters | Thermodynamic properties | Phase diagram | Magnetic properties | Atomic positions and site-specific magnetic data | Pair-wise magnetic data | Methods | References

Space group:

Crystal system

cubic

Space group number

216

Hermann-Mauguin

F-43m

Hall

F -4 2 3

Point group

-43m

Structure data:

Normalized formula

MnAs

The number of formula units per unit cell

4

The total number of atoms per unit cell

8

The number of inequivalent sites per unit cell

2

Structure search

MP

Lattice parameters:

a (Å)

5.7176

b (Å)

5.7176

c (Å)

5.7176

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

186.914

Density (g/cm3)

4.615

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

209.1 meV/atom

Formation energy above hull

450.9 meV/atom

Phase diagram:

Phase diagram

Related structures:

Compounds with the same formula: MnAs

3 entries found

Compounds with the same elements: Mn-As

10 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

14.63 μB/cell

Averaged magnetic moment

1.83 μB/atom

Magnetic polarization, Js = μ0Ms

0.91 T (= 724.2 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic anisotropy constant, Kd-a

-0.00 MJ/m3 (= -0.00 meV/cell)

Magnetic easy axis

<111>

Magnetic hardness parameter, κ

0.05

Atomic positions (fractional coordinates) and site-specific magnetic data:

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Mn 4a 0.000000 0.000000 0.000000 3.54 . .
2 Mn 4a 0.000000 0.500000 0.500000 3.53 . .
3 Mn 4a 0.500000 0.000000 0.500000 3.53 . .
4 Mn 4a 0.500000 0.500000 0.000000 3.53 . .
5 As 4c 0.250000 0.750000 0.750000 -0.17 . .
6 As 4c 0.250000 0.250000 0.250000 -0.17 . .
7 As 4c 0.750000 0.750000 0.250000 -0.17 . .
8 As 4c 0.750000 0.250000 0.750000 -0.17 . .
w: site multiplicity (the number of equivalent positions) and Wyckoff letter (a label for site symmetry)
m: local magnetic moment
Esoc100 (001): Spin-orbit coupling energy for the magnetization oriented along the crystallographic a (c) axis
(Individual Esoc values are temporarily not available while we perform maintenance.)
Terms and conditions

Site-resolved magnetic moments:

Local magnetic moments

Pair-wise magnetic data:

site i site j distance (Å) Jij (meV)
1 Mn 4a 2 Mn 4a 4.04 .
1 Mn 4a 3 Mn 4a 4.04 .
1 Mn 4a 4 Mn 4a 4.04 .
1 Mn 4a 5 As 4c 2.48 .
1 Mn 4a 6 As 4c 2.48 .
1 Mn 4a 7 As 4c 2.48 .
1 Mn 4a 8 As 4c 2.48 .
2 Mn 4a 3 Mn 4a 4.04 .
2 Mn 4a 4 Mn 4a 4.04 .
2 Mn 4a 5 As 4c 2.48 .
2 Mn 4a 6 As 4c 2.48 .
2 Mn 4a 7 As 4c 2.48 .
2 Mn 4a 8 As 4c 2.48 .
3 Mn 4a 4 Mn 4a 4.04 .
3 Mn 4a 5 As 4c 2.48 .
3 Mn 4a 6 As 4c 2.48 .
3 Mn 4a 7 As 4c 2.48 .
3 Mn 4a 8 As 4c 2.48 .
4 Mn 4a 5 As 4c 2.48 .
4 Mn 4a 6 As 4c 2.48 .
4 Mn 4a 7 As 4c 2.48 .
4 Mn 4a 8 As 4c 2.48 .
5 As 4c 6 As 4c 4.04 .
5 As 4c 7 As 4c 4.04 .
5 As 4c 8 As 4c 4.04 .
6 As 4c 7 As 4c 4.04 .
6 As 4c 8 As 4c 4.04 .
7 As 4c 8 As 4c 4.04 .
Jij: magnetic exchange parameter between site i and j (Individual Jij values are temporarily not available while we perform maintenance.)
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Terms and conditions

Pair-resolved magnetic exchange parameters:

Exchange coupling parameters

Individual exchange parameters:

Exchange coupling parameters

Methods:

DFT calculations

  • exchange-correlation energy functional: GGA-PBE
  • pseudopotential type: PAW
  • cutoff energy: 65.0 Ry
  • k-point grid: (kx, ky, kz) = (10, 10, 10) for magnetic anisotropy calculations
  • package: QE (v6.3)

LMTO-GF calculations

  • k-point grid: (kx, ky, kz) =
  • energy mesh: 41 points on an elliptical contour
  • package: Questaal (v7)

References:

References

Materials Project: mp-1009131
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