Material:

NiGeN2

ID:

MMD-3325

Explore database:

Compounds with the same formula: NiGeN2 (3 entries found)
Compounds with the same elements: Ni-Ge-N (5 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

hexagonal

Space group number

194

Hermann-Mauguin

P6_3/mmc

Hall

-P 6c 2c

Point group

6/mmm

Structure data:

Normalized formula

NiGeN2

The number of formula units per unit cell

2

The total number of atoms per unit cell

8

The number of inequivalent sites per unit cell

3

Structure search

MP

Lattice parameters:

a (Å)

2.9217

b (Å)

2.9217

c (Å)

10.2629

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

120.000

Volume (Å3)

75.872

Density (g/cm3)

6.975

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

710.5 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: NiGeN2

3 entries found

Compounds with the same elements: Ni-Ge-N

5 entries found

Binary compounds in Ni-Ge system

12 entries found

Binary compounds in Ni-N system

10 entries found

Binary compounds in Ge-N system

No entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

1.24 μB/cell

Averaged magnetic moment

0.15 μB/atom

Magnetic polarization, Js = μ0Ms

0.19 T (= 151.2 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 Ni 2a 0.000000 0.000000 0.000000 0.49 . .
2 Ni 2a 0.000000 0.000000 0.500000 0.49 . .
3 Ge 2d 0.666667 0.333333 0.250000 0.01 . .
4 Ge 2d 0.333333 0.666667 0.750000 0.01 . .
5 N 4f 0.666667 0.333333 0.879044 0.04 . .
6 N 4f 0.333333 0.666667 0.120956 0.04 . .
7 N 4f 0.333333 0.666667 0.379044 0.04 . .
8 N 4f 0.666667 0.333333 0.620956 0.04 . .
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 Ni 2a 2 Ni 2a 5.13 .
1 Ni 2a 3 Ge 2d 3.07 .
1 Ni 2a 4 Ge 2d 3.07 .
1 Ni 2a 5 N 4f 2.09 .
1 Ni 2a 6 N 4f 2.09 .
1 Ni 2a 7 N 4f 4.24 .
1 Ni 2a 8 N 4f 4.24 .
2 Ni 2a 3 Ge 2d 3.07 .
2 Ni 2a 4 Ge 2d 3.07 .
2 Ni 2a 5 N 4f 4.24 .
2 Ni 2a 6 N 4f 4.24 .
2 Ni 2a 7 N 4f 2.09 .
2 Ni 2a 8 N 4f 2.09 .
3 Ge 2d 4 Ge 2d 5.40 .
3 Ge 2d 5 N 4f 3.81 .
3 Ge 2d 6 N 4f 2.14 .
3 Ge 2d 7 N 4f 2.14 .
3 Ge 2d 8 N 4f 3.81 .
4 Ge 2d 5 N 4f 2.14 .
4 Ge 2d 6 N 4f 3.81 .
4 Ge 2d 7 N 4f 3.81 .
4 Ge 2d 8 N 4f 2.14 .
5 N 4f 6 N 4f 3.00 .
5 N 4f 7 N 4f 5.40 .
5 N 4f 8 N 4f 2.65 .
6 N 4f 7 N 4f 2.65 .
6 N 4f 8 N 4f 5.40 .
7 N 4f 8 N 4f 3.00 .
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) = (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-1245507
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