Material:

FeCo7N2

ID:

MMD-19

Explore database:

Compounds with the same formula: FeCo7N2 (7 entries found)
Compounds with the same elements: Fe-Co-N (272 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

123

Hermann-Mauguin

P4/mmm

Hall

-P 4 2

Point group

4/mmm

Structure data:

Normalized formula

FeCo7N2

The number of formula units per unit cell

1

The total number of atoms per unit cell

10

The number of inequivalent sites per unit cell

6

Structure search

AGA search

Lattice parameters:

a (Å)

3.7293

b (Å)

3.7293

c (Å)

7.4540

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

103.666

Density (g/cm3)

7.951

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

35.2 meV/atom

Formation energy above hull

61.8 meV/atom

Phase diagram:

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

Related structures:

Compounds with the same formula: FeCo7N2

7 entries found

Compounds with the same elements: Fe-Co-N

272 entries found

Binary compounds in Fe-Co system

11 entries found

Binary compounds in Fe-N system

38 entries found

Binary compounds in Co-N system

183 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

13.66 μB/cell

Averaged magnetic moment

1.37 μB/atom

Magnetic polarization, Js = μ0Ms

1.54 T (= 1225.5 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic anisotropy constant, Ka-c

-0.40 MJ/m3 (= -0.26 meV/cell)

Magnetic easy axis

ab plane

Magnetic hardness parameter, κ

0.46

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 N 2g 0.000000 0.000000 0.248620 0.11 . .
2 N 2g 0.000000 0.000000 0.751380 0.11 . .
3 Co 1c 0.500000 0.500000 0.000000 1.84 . .
4 Co 1a 0.000000 0.000000 0.000000 1.36 . .
5 Co 4i 0.000000 0.500000 0.250510 1.37 . .
6 Co 4i 0.000000 0.500000 0.749490 1.37 . .
7 Co 4i 0.500000 0.000000 0.250510 1.37 . .
8 Co 4i 0.500000 0.000000 0.749490 1.37 . .
9 Co 1b 0.000000 0.000000 0.500000 1.38 . .
10 Fe 1d 0.500000 0.500000 0.500000 3.08 . .
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 N 2g 2 N 2g 3.71 .
1 N 2g 3 Co 1c 3.22 .
1 N 2g 4 Co 1a 1.85 .
1 N 2g 5 Co 4i 1.86 .
1 N 2g 6 Co 4i 4.16 .
1 N 2g 7 Co 4i 1.86 .
1 N 2g 8 Co 4i 4.16 .
1 N 2g 9 Co 1b 1.87 .
1 N 2g 10 Fe 1d 3.23 .
2 N 2g 3 Co 1c 3.22 .
2 N 2g 4 Co 1a 1.85 .
2 N 2g 5 Co 4i 4.16 .
2 N 2g 6 Co 4i 1.86 .
2 N 2g 7 Co 4i 4.16 .
2 N 2g 8 Co 4i 1.86 .
2 N 2g 9 Co 1b 1.87 .
2 N 2g 10 Fe 1d 3.23 .
3 Co 1c 4 Co 1a 2.64 .
3 Co 1c 5 Co 4i 2.64 .
3 Co 1c 6 Co 4i 2.64 .
3 Co 1c 7 Co 4i 2.64 .
3 Co 1c 8 Co 4i 2.64 .
3 Co 1c 9 Co 1b 4.57 .
3 Co 1c 10 Fe 1d 3.73 .
4 Co 1a 5 Co 4i 2.64 .
4 Co 1a 6 Co 4i 2.64 .
4 Co 1a 7 Co 4i 2.64 .
4 Co 1a 8 Co 4i 2.64 .
4 Co 1a 9 Co 1b 3.73 .
4 Co 1a 10 Fe 1d 4.57 .
5 Co 4i 6 Co 4i 3.72 .
5 Co 4i 7 Co 4i 2.64 .
5 Co 4i 8 Co 4i 4.56 .
5 Co 4i 9 Co 1b 2.63 .
5 Co 4i 10 Fe 1d 2.63 .
6 Co 4i 7 Co 4i 4.56 .
6 Co 4i 8 Co 4i 2.64 .
6 Co 4i 9 Co 1b 2.63 .
6 Co 4i 10 Fe 1d 2.63 .
7 Co 4i 8 Co 4i 3.72 .
7 Co 4i 9 Co 1b 2.63 .
7 Co 4i 10 Fe 1d 2.63 .
8 Co 4i 9 Co 1b 2.63 .
8 Co 4i 10 Fe 1d 2.63 .
9 Co 1b 10 Fe 1d 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:

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) = (16, 16, 8) 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

Phys. Rev. B 94, 224424 (2016). DOI: 10.1103/PhysRevB.94.224424
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