Material:

CrN2

ID:

MMD-3575

Explore database:

Compounds with the same formula: CrN2 (63 entries found)
Compounds with the same elements: Cr-N (85 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

tetragonal

Space group number

136

Hermann-Mauguin

P4_2/mnm

Hall

-P 4n 2n

Point group

4/mmm

Structure data:

Normalized formula

CrN2

The number of formula units per unit cell

2

The total number of atoms per unit cell

6

The number of inequivalent sites per unit cell

2

Structure search

MP

Lattice parameters:

a (Å)

4.6507

b (Å)

4.6507

c (Å)

2.6524

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

57.369

Density (g/cm3)

4.632

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

272.1 meV/atom

Formation energy above hull

625.8 meV/atom

Phase diagram:

Phase diagram

Related structures:

Compounds with the same formula: CrN2

63 entries found

Compounds with the same elements: Cr-N

85 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

0.04 μB/cell

Averaged magnetic moment

0.01 μB/atom

Magnetic polarization, Js = μ0Ms

0.01 T (= 8.0 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 Cr 2a 0.500000 0.500000 0.500000 0.49 . .
2 Cr 2a 0.000000 0.000000 0.000000 0.49 . .
3 N 4f 0.798967 0.201033 0.500000 -0.24 . .
4 N 4f 0.201033 0.798967 0.500000 -0.24 . .
5 N 4f 0.298967 0.298967 0.000000 -0.24 . .
6 N 4f 0.701033 0.701033 0.000000 -0.24 . .
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 Cr 2a 2 Cr 2a 3.55 .
1 Cr 2a 3 N 4f 1.97 .
1 Cr 2a 4 N 4f 1.97 .
1 Cr 2a 5 N 4f 1.87 .
1 Cr 2a 6 N 4f 1.87 .
2 Cr 2a 3 N 4f 1.87 .
2 Cr 2a 4 N 4f 1.87 .
2 Cr 2a 5 N 4f 1.97 .
2 Cr 2a 6 N 4f 1.97 .
3 N 4f 4 N 4f 2.64 .
3 N 4f 5 N 4f 2.72 .
3 N 4f 6 N 4f 2.72 .
4 N 4f 5 N 4f 2.72 .
4 N 4f 6 N 4f 2.72 .
5 N 4f 6 N 4f 2.64 .
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-1014366
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