Material:

FeGe

ID:

MMD-1192

Explore database:

Compounds with the same formula: FeGe (3 entries found)
Compounds with the same elements: Fe-Ge (21 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

198

Hermann-Mauguin

P2_13

Hall

P 2ac 2ab 3

Point group

23

Structure data:

Normalized formula

FeGe

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)

4.6706

b (Å)

4.6706

c (Å)

4.6706

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

101.888

Density (g/cm3)

8.376

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-90.8 meV/atom

Formation energy above hull

31.0 meV/atom

Phase diagram:

Phase diagram

Related structures:

Compounds with the same formula: FeGe

3 entries found

Compounds with the same elements: Fe-Ge

21 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

4.23 μB/cell

Averaged magnetic moment

0.53 μB/atom

Magnetic polarization, Js = μ0Ms

0.48 T (= 382.0 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

0.08

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Fe 4a 0.135712 0.135712 0.135712 1.17 . .
2 Fe 4a 0.364288 0.864288 0.635712 1.17 . .
3 Fe 4a 0.635712 0.364288 0.864288 1.17 . .
4 Fe 4a 0.864288 0.635712 0.364288 1.17 . .
5 Ge 4a 0.842084 0.842084 0.842084 -0.05 . .
6 Ge 4a 0.657916 0.157916 0.342084 -0.05 . .
7 Ge 4a 0.342084 0.657916 0.157916 -0.05 . .
8 Ge 4a 0.157916 0.342084 0.657916 -0.05 . .
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 Fe 4a 2 Fe 4a 2.86 .
1 Fe 4a 3 Fe 4a 2.86 .
1 Fe 4a 4 Fe 4a 2.86 .
1 Fe 4a 5 Ge 4a 2.38 .
1 Fe 4a 6 Ge 4a 2.43 .
1 Fe 4a 7 Ge 4a 2.43 .
1 Fe 4a 8 Ge 4a 2.43 .
2 Fe 4a 3 Fe 4a 2.86 .
2 Fe 4a 4 Fe 4a 2.86 .
2 Fe 4a 5 Ge 4a 2.43 .
2 Fe 4a 6 Ge 4a 2.38 .
2 Fe 4a 7 Ge 4a 2.43 .
2 Fe 4a 8 Ge 4a 2.43 .
3 Fe 4a 4 Fe 4a 2.86 .
3 Fe 4a 5 Ge 4a 2.43 .
3 Fe 4a 6 Ge 4a 2.43 .
3 Fe 4a 7 Ge 4a 2.38 .
3 Fe 4a 8 Ge 4a 2.43 .
4 Fe 4a 5 Ge 4a 2.43 .
4 Fe 4a 6 Ge 4a 2.43 .
4 Fe 4a 7 Ge 4a 2.43 .
4 Fe 4a 8 Ge 4a 2.38 .
5 Ge 4a 6 Ge 4a 2.89 .
5 Ge 4a 7 Ge 4a 2.89 .
5 Ge 4a 8 Ge 4a 2.89 .
6 Ge 4a 7 Ge 4a 2.89 .
6 Ge 4a 8 Ge 4a 2.89 .
7 Ge 4a 8 Ge 4a 2.89 .
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:


Diagram is not available for this entry.

Individual exchange parameters:


Diagram is not available for this entry.

Methods:

DFT calculations

  • exchange-correlation energy functional: GGA-PBE
  • pseudopotential type: PAW
  • cutoff energy: 65.0 Ry
  • k-point grid: (kx, ky, kz) = (14, 14, 14) 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-21255
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