Material:

MnGeAs2

ID:

MMD-2843

Explore database:

Compounds with the same formula: MnGeAs2 (1 entry found)
Compounds with the same elements: Mn-Ge-As (1 entry 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

tetragonal

Space group number

122

Hermann-Mauguin

I-42d

Hall

I -4 2bw

Point group

-42m

Structure data:

Normalized formula

MnGeAs2

The number of formula units per unit cell

4

The total number of atoms per unit cell

16

The number of inequivalent sites per unit cell

3

Structure search

MP

Lattice parameters:

a (Å)

5.8349

b (Å)

5.8349

c (Å)

11.3837

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

387.572

Density (g/cm3)

4.754

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

58.8 meV/atom

Formation energy above hull

Phase diagram:

Phase diagram
The convex hull is temporarily not available while we perform maintenance.

Related structures:

Compounds with the same formula: MnGeAs2

1 entry found

Compounds with the same elements: Mn-Ge-As

1 entry found

Binary compounds in Mn-Ge system

14 entries found

Binary compounds in Mn-As system

10 entries found

Binary compounds in Ge-As system

No entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

18.25 μB/cell

Averaged magnetic moment

1.14 μB/atom

Magnetic polarization, Js = μ0Ms

0.55 T (= 437.7 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic easy axis

Magnetic hardness parameter, κ

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Mn 4b 0.500000 0.000000 0.250000 3.88 . .
2 Mn 4b 0.000000 0.000000 0.500000 3.89 . .
3 Mn 4b 0.000000 0.500000 0.750000 3.88 . .
4 Mn 4b 0.500000 0.500000 0.000000 3.88 . .
5 Ge 4a 0.000000 0.500000 0.250000 0.06 . .
6 Ge 4a 0.500000 0.500000 0.500000 0.06 . .
7 Ge 4a 0.500000 0.000000 0.750000 0.06 . .
8 Ge 4a 0.000000 0.000000 0.000000 0.06 . .
9 As 8d 0.750000 0.744731 0.375000 -0.01 . .
10 As 8d 0.250000 0.255269 0.375000 -0.01 . .
11 As 8d 0.744731 0.250000 0.625000 -0.01 . .
12 As 8d 0.255269 0.750000 0.625000 -0.01 . .
13 As 8d 0.250000 0.244731 0.875000 -0.01 . .
14 As 8d 0.750000 0.755269 0.875000 -0.01 . .
15 As 8d 0.244731 0.750000 0.125000 -0.01 . .
16 As 8d 0.755269 0.250000 0.125000 -0.01 . .
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 4b 2 Mn 4b 4.08 .
1 Mn 4b 3 Mn 4b 7.03 .
1 Mn 4b 4 Mn 4b 4.08 .
1 Mn 4b 5 Ge 4a 4.13 .
1 Mn 4b 6 Ge 4a 4.08 .
1 Mn 4b 7 Ge 4a 5.69 .
1 Mn 4b 8 Ge 4a 4.08 .
1 Mn 4b 9 As 8d 2.52 .
1 Mn 4b 10 As 8d 2.52 .
1 Mn 4b 11 As 8d 4.73 .
1 Mn 4b 12 As 8d 4.73 .
1 Mn 4b 13 As 8d 4.73 .
1 Mn 4b 14 As 8d 4.73 .
1 Mn 4b 15 As 8d 2.52 .
1 Mn 4b 16 As 8d 2.52 .
2 Mn 4b 3 Mn 4b 4.08 .
2 Mn 4b 4 Mn 4b 7.03 .
2 Mn 4b 5 Ge 4a 4.08 .
2 Mn 4b 6 Ge 4a 4.13 .
2 Mn 4b 7 Ge 4a 4.08 .
2 Mn 4b 8 Ge 4a 5.69 .
2 Mn 4b 9 As 8d 2.52 .
2 Mn 4b 10 As 8d 2.52 .
2 Mn 4b 11 As 8d 2.52 .
2 Mn 4b 12 As 8d 2.52 .
2 Mn 4b 13 As 8d 4.73 .
2 Mn 4b 14 As 8d 4.73 .
2 Mn 4b 15 As 8d 4.73 .
2 Mn 4b 16 As 8d 4.73 .
3 Mn 4b 4 Mn 4b 4.08 .
3 Mn 4b 5 Ge 4a 5.69 .
3 Mn 4b 6 Ge 4a 4.08 .
3 Mn 4b 7 Ge 4a 4.13 .
3 Mn 4b 8 Ge 4a 4.08 .
3 Mn 4b 9 As 8d 4.73 .
3 Mn 4b 10 As 8d 4.73 .
3 Mn 4b 11 As 8d 2.52 .
3 Mn 4b 12 As 8d 2.52 .
3 Mn 4b 13 As 8d 2.52 .
3 Mn 4b 14 As 8d 2.52 .
3 Mn 4b 15 As 8d 4.73 .
3 Mn 4b 16 As 8d 4.73 .
4 Mn 4b 5 Ge 4a 4.08 .
4 Mn 4b 6 Ge 4a 5.69 .
4 Mn 4b 7 Ge 4a 4.08 .
4 Mn 4b 8 Ge 4a 4.13 .
4 Mn 4b 9 As 8d 4.73 .
4 Mn 4b 10 As 8d 4.73 .
4 Mn 4b 11 As 8d 4.73 .
4 Mn 4b 12 As 8d 4.73 .
4 Mn 4b 13 As 8d 2.52 .
4 Mn 4b 14 As 8d 2.52 .
4 Mn 4b 15 As 8d 2.52 .
4 Mn 4b 16 As 8d 2.52 .
5 Ge 4a 6 Ge 4a 4.08 .
5 Ge 4a 7 Ge 4a 7.03 .
5 Ge 4a 8 Ge 4a 4.08 .
5 Ge 4a 9 As 8d 2.49 .
5 Ge 4a 10 As 8d 2.49 .
5 Ge 4a 11 As 8d 4.75 .
5 Ge 4a 12 As 8d 4.75 .
5 Ge 4a 13 As 8d 4.75 .
5 Ge 4a 14 As 8d 4.75 .
5 Ge 4a 15 As 8d 2.49 .
5 Ge 4a 16 As 8d 2.49 .
6 Ge 4a 7 Ge 4a 4.08 .
6 Ge 4a 8 Ge 4a 7.03 .
6 Ge 4a 9 As 8d 2.49 .
6 Ge 4a 10 As 8d 2.49 .
6 Ge 4a 11 As 8d 2.49 .
6 Ge 4a 12 As 8d 2.49 .
6 Ge 4a 13 As 8d 4.75 .
6 Ge 4a 14 As 8d 4.75 .
6 Ge 4a 15 As 8d 4.75 .
6 Ge 4a 16 As 8d 4.75 .
7 Ge 4a 8 Ge 4a 4.08 .
7 Ge 4a 9 As 8d 4.75 .
7 Ge 4a 10 As 8d 4.75 .
7 Ge 4a 11 As 8d 2.49 .
7 Ge 4a 12 As 8d 2.49 .
7 Ge 4a 13 As 8d 2.49 .
7 Ge 4a 14 As 8d 2.49 .
7 Ge 4a 15 As 8d 4.75 .
7 Ge 4a 16 As 8d 4.75 .
8 Ge 4a 9 As 8d 4.75 .
8 Ge 4a 10 As 8d 4.75 .
8 Ge 4a 11 As 8d 4.75 .
8 Ge 4a 12 As 8d 4.75 .
8 Ge 4a 13 As 8d 2.49 .
8 Ge 4a 14 As 8d 2.49 .
8 Ge 4a 15 As 8d 2.49 .
8 Ge 4a 16 As 8d 2.49 .
9 As 8d 10 As 8d 4.08 .
9 As 8d 11 As 8d 4.05 .
9 As 8d 12 As 8d 4.05 .
9 As 8d 13 As 8d 7.03 .
9 As 8d 14 As 8d 5.69 .
9 As 8d 15 As 8d 4.05 .
9 As 8d 16 As 8d 4.05 .
10 As 8d 11 As 8d 4.05 .
10 As 8d 12 As 8d 4.05 .
10 As 8d 13 As 8d 5.69 .
10 As 8d 14 As 8d 7.03 .
10 As 8d 15 As 8d 4.05 .
10 As 8d 16 As 8d 4.05 .
11 As 8d 12 As 8d 4.08 .
11 As 8d 13 As 8d 4.05 .
11 As 8d 14 As 8d 4.05 .
11 As 8d 15 As 8d 7.03 .
11 As 8d 16 As 8d 5.69 .
12 As 8d 13 As 8d 4.05 .
12 As 8d 14 As 8d 4.05 .
12 As 8d 15 As 8d 5.69 .
12 As 8d 16 As 8d 7.03 .
13 As 8d 14 As 8d 4.08 .
13 As 8d 15 As 8d 4.05 .
13 As 8d 16 As 8d 4.05 .
14 As 8d 15 As 8d 4.05 .
14 As 8d 16 As 8d 4.05 .
15 As 8d 16 As 8d 4.08 .
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) = (None, None, None) 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-1206018
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