Material:

CrCoAs

ID:

MMD-1802

Explore database:

Compounds with the same formula: CrCoAs (1 entry found)
Compounds with the same elements: Cr-Co-As (2 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

189

Hermann-Mauguin

P-62m

Hall

P -6 -2

Point group

-6m2

Structure data:

Normalized formula

CrCoAs

The number of formula units per unit cell

3

The total number of atoms per unit cell

9

The number of inequivalent sites per unit cell

4

Structure search

MP

Lattice parameters:

a (Å)

6.0758

b (Å)

6.0758

c (Å)

3.6466

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

120.000

Volume (Å3)

116.581

Density (g/cm3)

7.942

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-145.7 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: CrCoAs

1 entry found

Compounds with the same elements: Cr-Co-As

2 entries found

Binary compounds in Cr-Co system

7 entries found

Binary compounds in Cr-As system

9 entries found

Binary compounds in Co-As system

9 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

9.51 μB/cell

Averaged magnetic moment

1.06 μB/atom

Magnetic polarization, Js = μ0Ms

0.95 T (= 756.0 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 3f 0.586577 0.000000 0.000000 2.50 . .
2 Cr 3f -0.000000 0.586577 0.000000 2.50 . .
3 Cr 3f 0.413423 0.413423 0.000000 2.50 . .
4 Co 3g 0.247496 0.000000 0.500000 0.58 . .
5 Co 3g -0.000000 0.247496 0.500000 0.58 . .
6 Co 3g 0.752504 0.752504 0.500000 0.58 . .
7 As 2d 0.333333 0.666667 0.500000 -0.08 . .
8 As 2d 0.666667 0.333333 0.500000 -0.08 . .
9 As 1a 0.000000 0.000000 0.000000 -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 Cr 3f 2 Cr 3f 3.17 .
1 Cr 3f 3 Cr 3f 3.17 .
1 Cr 3f 4 Co 3g 2.75 .
1 Cr 3f 5 Co 3g 2.85 .
1 Cr 3f 6 Co 3g 2.85 .
1 Cr 3f 7 As 2d 2.58 .
1 Cr 3f 8 As 2d 2.58 .
1 Cr 3f 9 As 1a 2.51 .
2 Cr 3f 3 Cr 3f 3.17 .
2 Cr 3f 4 Co 3g 2.85 .
2 Cr 3f 5 Co 3g 2.75 .
2 Cr 3f 6 Co 3g 2.85 .
2 Cr 3f 7 As 2d 2.58 .
2 Cr 3f 8 As 2d 2.58 .
2 Cr 3f 9 As 1a 2.51 .
3 Cr 3f 4 Co 3g 2.85 .
3 Cr 3f 5 Co 3g 2.85 .
3 Cr 3f 6 Co 3g 2.75 .
3 Cr 3f 7 As 2d 2.58 .
3 Cr 3f 8 As 2d 2.58 .
3 Cr 3f 9 As 1a 2.51 .
4 Co 3g 5 Co 3g 2.60 .
4 Co 3g 6 Co 3g 2.60 .
4 Co 3g 7 As 2d 2.33 .
4 Co 3g 8 As 2d 2.33 .
4 Co 3g 9 As 1a 2.36 .
5 Co 3g 6 Co 3g 2.60 .
5 Co 3g 7 As 2d 2.33 .
5 Co 3g 8 As 2d 2.33 .
5 Co 3g 9 As 1a 2.36 .
6 Co 3g 7 As 2d 2.33 .
6 Co 3g 8 As 2d 2.33 .
6 Co 3g 9 As 1a 2.36 .
7 As 2d 8 As 2d 3.51 .
7 As 2d 9 As 1a 3.95 .
8 As 2d 9 As 1a 3.95 .
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-1206397
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