Material:

FeCoB

ID:

MMD-2621

Explore database:

Compounds with the same formula: FeCoB (1 entry found)
Compounds with the same elements: Fe-Co-B (3 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

orthorhombic

Space group number

69

Hermann-Mauguin

Fmmm

Hall

-F 2 2

Point group

mmm

Structure data:

Normalized formula

FeCoB

The number of formula units per unit cell

8

The total number of atoms per unit cell

24

The number of inequivalent sites per unit cell

3

Structure search

MP

Lattice parameters:

a (Å)

4.1956

b (Å)

7.0549

c (Å)

7.1962

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

213.005

Density (g/cm3)

7.833

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-287.7 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: FeCoB

1 entry found

Compounds with the same elements: Fe-Co-B

3 entries found

Binary compounds in Fe-Co system

11 entries found

Binary compounds in Fe-B system

14 entries found

Binary compounds in Co-B system

6 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

23.85 μB/cell

Averaged magnetic moment

0.99 μB/atom

Magnetic polarization, Js = μ0Ms

1.30 T (= 1034.5 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic anisotropy constant, Ka-c

-0.52 MJ/m3 (= -0.69 meV/cell)

Magnetic anisotropy constant, Kb-c

-0.34 MJ/m3 (= -0.46 meV/cell)

Magnetic anisotropy constant, Kb-a

0.17 MJ/m3 (= 0.23 meV/cell)

Magnetic easy axis

a

Magnetic hardness parameter, κ

0.62

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Fe 8h 0.000000 0.335373 0.500000 1.91 . .
2 Fe 8h 0.500000 0.164627 0.500000 1.91 . .
3 Fe 8h 0.000000 0.835373 0.000000 1.91 . .
4 Fe 8h 0.500000 0.664627 0.000000 1.91 . .
5 Fe 8h 0.500000 0.335373 0.000000 1.91 . .
6 Fe 8h 0.000000 0.164627 0.000000 1.91 . .
7 Fe 8h 0.500000 0.835373 0.500000 1.91 . .
8 Fe 8h 0.000000 0.664627 0.500000 1.91 . .
9 Co 8i 0.000000 0.000000 0.665349 1.16 . .
10 Co 8i 0.500000 0.500000 0.334651 1.16 . .
11 Co 8i 0.000000 0.500000 0.165349 1.16 . .
12 Co 8i 0.500000 0.000000 0.834651 1.16 . .
13 Co 8i 0.500000 0.000000 0.165349 1.16 . .
14 Co 8i 0.000000 0.500000 0.834651 1.16 . .
15 Co 8i 0.500000 0.500000 0.665349 1.16 . .
16 Co 8i 0.000000 0.000000 0.334651 1.16 . .
17 B 8f 0.250000 0.250000 0.250000 -0.08 . .
18 B 8f 0.750000 0.250000 0.250000 -0.08 . .
19 B 8f 0.250000 0.750000 0.750000 -0.08 . .
20 B 8f 0.750000 0.750000 0.750000 -0.08 . .
21 B 8f 0.750000 0.250000 0.750000 -0.08 . .
22 B 8f 0.250000 0.250000 0.750000 -0.08 . .
23 B 8f 0.750000 0.750000 0.250000 -0.08 . .
24 B 8f 0.250000 0.750000 0.250000 -0.08 . .
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 Fe 8h 2 Fe 8h 2.42 .
1 Fe 8h 3 Fe 8h 5.04 .
1 Fe 8h 4 Fe 8h 4.77 .
1 Fe 8h 5 Fe 8h 4.16 .
1 Fe 8h 6 Fe 8h 3.79 .
1 Fe 8h 7 Fe 8h 4.10 .
1 Fe 8h 8 Fe 8h 2.32 .
1 Fe 8h 9 Co 8i 2.65 .
1 Fe 8h 10 Co 8i 2.68 .
1 Fe 8h 11 Co 8i 2.67 .
1 Fe 8h 12 Co 8i 3.97 .
1 Fe 8h 13 Co 8i 3.97 .
1 Fe 8h 14 Co 8i 2.67 .
1 Fe 8h 15 Co 8i 2.68 .
1 Fe 8h 16 Co 8i 2.65 .
1 Fe 8h 17 B 8f 2.17 .
1 Fe 8h 18 B 8f 2.17 .
1 Fe 8h 19 B 8f 3.59 .
1 Fe 8h 20 B 8f 3.59 .
1 Fe 8h 21 B 8f 2.17 .
1 Fe 8h 22 B 8f 2.17 .
1 Fe 8h 23 B 8f 3.59 .
1 Fe 8h 24 B 8f 3.59 .
2 Fe 8h 3 Fe 8h 4.77 .
2 Fe 8h 4 Fe 8h 5.04 .
2 Fe 8h 5 Fe 8h 3.79 .
2 Fe 8h 6 Fe 8h 4.16 .
2 Fe 8h 7 Fe 8h 2.32 .
2 Fe 8h 8 Fe 8h 4.10 .
2 Fe 8h 9 Co 8i 2.68 .
2 Fe 8h 10 Co 8i 2.65 .
2 Fe 8h 11 Co 8i 3.97 .
2 Fe 8h 12 Co 8i 2.67 .
2 Fe 8h 13 Co 8i 2.67 .
2 Fe 8h 14 Co 8i 3.97 .
2 Fe 8h 15 Co 8i 2.65 .
2 Fe 8h 16 Co 8i 2.68 .
2 Fe 8h 17 B 8f 2.17 .
2 Fe 8h 18 B 8f 2.17 .
2 Fe 8h 19 B 8f 3.59 .
2 Fe 8h 20 B 8f 3.59 .
2 Fe 8h 21 B 8f 2.17 .
2 Fe 8h 22 B 8f 2.17 .
2 Fe 8h 23 B 8f 3.59 .
2 Fe 8h 24 B 8f 3.59 .
3 Fe 8h 4 Fe 8h 2.42 .
3 Fe 8h 5 Fe 8h 4.10 .
3 Fe 8h 6 Fe 8h 2.32 .
3 Fe 8h 7 Fe 8h 4.16 .
3 Fe 8h 8 Fe 8h 3.79 .
3 Fe 8h 9 Co 8i 2.67 .
3 Fe 8h 10 Co 8i 3.97 .
3 Fe 8h 11 Co 8i 2.65 .
3 Fe 8h 12 Co 8i 2.68 .
3 Fe 8h 13 Co 8i 2.68 .
3 Fe 8h 14 Co 8i 2.65 .
3 Fe 8h 15 Co 8i 3.97 .
3 Fe 8h 16 Co 8i 2.67 .
3 Fe 8h 17 B 8f 3.59 .
3 Fe 8h 18 B 8f 3.59 .
3 Fe 8h 19 B 8f 2.17 .
3 Fe 8h 20 B 8f 2.17 .
3 Fe 8h 21 B 8f 3.59 .
3 Fe 8h 22 B 8f 3.59 .
3 Fe 8h 23 B 8f 2.17 .
3 Fe 8h 24 B 8f 2.17 .
4 Fe 8h 5 Fe 8h 2.32 .
4 Fe 8h 6 Fe 8h 4.10 .
4 Fe 8h 7 Fe 8h 3.79 .
4 Fe 8h 8 Fe 8h 4.16 .
4 Fe 8h 9 Co 8i 3.97 .
4 Fe 8h 10 Co 8i 2.67 .
4 Fe 8h 11 Co 8i 2.68 .
4 Fe 8h 12 Co 8i 2.65 .
4 Fe 8h 13 Co 8i 2.65 .
4 Fe 8h 14 Co 8i 2.68 .
4 Fe 8h 15 Co 8i 2.67 .
4 Fe 8h 16 Co 8i 3.97 .
4 Fe 8h 17 B 8f 3.59 .
4 Fe 8h 18 B 8f 3.59 .
4 Fe 8h 19 B 8f 2.17 .
4 Fe 8h 20 B 8f 2.17 .
4 Fe 8h 21 B 8f 3.59 .
4 Fe 8h 22 B 8f 3.59 .
4 Fe 8h 23 B 8f 2.17 .
4 Fe 8h 24 B 8f 2.17 .
5 Fe 8h 6 Fe 8h 2.42 .
5 Fe 8h 7 Fe 8h 5.04 .
5 Fe 8h 8 Fe 8h 4.77 .
5 Fe 8h 9 Co 8i 3.97 .
5 Fe 8h 10 Co 8i 2.67 .
5 Fe 8h 11 Co 8i 2.68 .
5 Fe 8h 12 Co 8i 2.65 .
5 Fe 8h 13 Co 8i 2.65 .
5 Fe 8h 14 Co 8i 2.68 .
5 Fe 8h 15 Co 8i 2.67 .
5 Fe 8h 16 Co 8i 3.97 .
5 Fe 8h 17 B 8f 2.17 .
5 Fe 8h 18 B 8f 2.17 .
5 Fe 8h 19 B 8f 3.59 .
5 Fe 8h 20 B 8f 3.59 .
5 Fe 8h 21 B 8f 2.17 .
5 Fe 8h 22 B 8f 2.17 .
5 Fe 8h 23 B 8f 3.59 .
5 Fe 8h 24 B 8f 3.59 .
6 Fe 8h 7 Fe 8h 4.77 .
6 Fe 8h 8 Fe 8h 5.04 .
6 Fe 8h 9 Co 8i 2.67 .
6 Fe 8h 10 Co 8i 3.97 .
6 Fe 8h 11 Co 8i 2.65 .
6 Fe 8h 12 Co 8i 2.68 .
6 Fe 8h 13 Co 8i 2.68 .
6 Fe 8h 14 Co 8i 2.65 .
6 Fe 8h 15 Co 8i 3.97 .
6 Fe 8h 16 Co 8i 2.67 .
6 Fe 8h 17 B 8f 2.17 .
6 Fe 8h 18 B 8f 2.17 .
6 Fe 8h 19 B 8f 3.59 .
6 Fe 8h 20 B 8f 3.59 .
6 Fe 8h 21 B 8f 2.17 .
6 Fe 8h 22 B 8f 2.17 .
6 Fe 8h 23 B 8f 3.59 .
6 Fe 8h 24 B 8f 3.59 .
7 Fe 8h 8 Fe 8h 2.42 .
7 Fe 8h 9 Co 8i 2.68 .
7 Fe 8h 10 Co 8i 2.65 .
7 Fe 8h 11 Co 8i 3.97 .
7 Fe 8h 12 Co 8i 2.67 .
7 Fe 8h 13 Co 8i 2.67 .
7 Fe 8h 14 Co 8i 3.97 .
7 Fe 8h 15 Co 8i 2.65 .
7 Fe 8h 16 Co 8i 2.68 .
7 Fe 8h 17 B 8f 3.59 .
7 Fe 8h 18 B 8f 3.59 .
7 Fe 8h 19 B 8f 2.17 .
7 Fe 8h 20 B 8f 2.17 .
7 Fe 8h 21 B 8f 3.59 .
7 Fe 8h 22 B 8f 3.59 .
7 Fe 8h 23 B 8f 2.17 .
7 Fe 8h 24 B 8f 2.17 .
8 Fe 8h 9 Co 8i 2.65 .
8 Fe 8h 10 Co 8i 2.68 .
8 Fe 8h 11 Co 8i 2.67 .
8 Fe 8h 12 Co 8i 3.97 .
8 Fe 8h 13 Co 8i 3.97 .
8 Fe 8h 14 Co 8i 2.67 .
8 Fe 8h 15 Co 8i 2.68 .
8 Fe 8h 16 Co 8i 2.65 .
8 Fe 8h 17 B 8f 3.59 .
8 Fe 8h 18 B 8f 3.59 .
8 Fe 8h 19 B 8f 2.17 .
8 Fe 8h 20 B 8f 2.17 .
8 Fe 8h 21 B 8f 3.59 .
8 Fe 8h 22 B 8f 3.59 .
8 Fe 8h 23 B 8f 2.17 .
8 Fe 8h 24 B 8f 2.17 .
9 Co 8i 10 Co 8i 4.74 .
9 Co 8i 11 Co 8i 5.04 .
9 Co 8i 12 Co 8i 2.43 .
9 Co 8i 13 Co 8i 4.16 .
9 Co 8i 14 Co 8i 3.73 .
9 Co 8i 15 Co 8i 4.10 .
9 Co 8i 16 Co 8i 2.38 .
9 Co 8i 17 B 8f 3.63 .
9 Co 8i 18 B 8f 3.63 .
9 Co 8i 19 B 8f 2.14 .
9 Co 8i 20 B 8f 2.14 .
9 Co 8i 21 B 8f 2.14 .
9 Co 8i 22 B 8f 2.14 .
9 Co 8i 23 B 8f 3.63 .
9 Co 8i 24 B 8f 3.63 .
10 Co 8i 11 Co 8i 2.43 .
10 Co 8i 12 Co 8i 5.04 .
10 Co 8i 13 Co 8i 3.73 .
10 Co 8i 14 Co 8i 4.16 .
10 Co 8i 15 Co 8i 2.38 .
10 Co 8i 16 Co 8i 4.10 .
10 Co 8i 17 B 8f 2.14 .
10 Co 8i 18 B 8f 2.14 .
10 Co 8i 19 B 8f 3.63 .
10 Co 8i 20 B 8f 3.63 .
10 Co 8i 21 B 8f 3.63 .
10 Co 8i 22 B 8f 3.63 .
10 Co 8i 23 B 8f 2.14 .
10 Co 8i 24 B 8f 2.14 .
11 Co 8i 12 Co 8i 4.74 .
11 Co 8i 13 Co 8i 4.10 .
11 Co 8i 14 Co 8i 2.38 .
11 Co 8i 15 Co 8i 4.16 .
11 Co 8i 16 Co 8i 3.73 .
11 Co 8i 17 B 8f 2.14 .
11 Co 8i 18 B 8f 2.14 .
11 Co 8i 19 B 8f 3.63 .
11 Co 8i 20 B 8f 3.63 .
11 Co 8i 21 B 8f 3.63 .
11 Co 8i 22 B 8f 3.63 .
11 Co 8i 23 B 8f 2.14 .
11 Co 8i 24 B 8f 2.14 .
12 Co 8i 13 Co 8i 2.38 .
12 Co 8i 14 Co 8i 4.10 .
12 Co 8i 15 Co 8i 3.73 .
12 Co 8i 16 Co 8i 4.16 .
12 Co 8i 17 B 8f 3.63 .
12 Co 8i 18 B 8f 3.63 .
12 Co 8i 19 B 8f 2.14 .
12 Co 8i 20 B 8f 2.14 .
12 Co 8i 21 B 8f 2.14 .
12 Co 8i 22 B 8f 2.14 .
12 Co 8i 23 B 8f 3.63 .
12 Co 8i 24 B 8f 3.63 .
13 Co 8i 14 Co 8i 4.74 .
13 Co 8i 15 Co 8i 5.04 .
13 Co 8i 16 Co 8i 2.43 .
13 Co 8i 17 B 8f 2.14 .
13 Co 8i 18 B 8f 2.14 .
13 Co 8i 19 B 8f 3.63 .
13 Co 8i 20 B 8f 3.63 .
13 Co 8i 21 B 8f 3.63 .
13 Co 8i 22 B 8f 3.63 .
13 Co 8i 23 B 8f 2.14 .
13 Co 8i 24 B 8f 2.14 .
14 Co 8i 15 Co 8i 2.43 .
14 Co 8i 16 Co 8i 5.04 .
14 Co 8i 17 B 8f 3.63 .
14 Co 8i 18 B 8f 3.63 .
14 Co 8i 19 B 8f 2.14 .
14 Co 8i 20 B 8f 2.14 .
14 Co 8i 21 B 8f 2.14 .
14 Co 8i 22 B 8f 2.14 .
14 Co 8i 23 B 8f 3.63 .
14 Co 8i 24 B 8f 3.63 .
15 Co 8i 16 Co 8i 4.74 .
15 Co 8i 17 B 8f 3.63 .
15 Co 8i 18 B 8f 3.63 .
15 Co 8i 19 B 8f 2.14 .
15 Co 8i 20 B 8f 2.14 .
15 Co 8i 21 B 8f 2.14 .
15 Co 8i 22 B 8f 2.14 .
15 Co 8i 23 B 8f 3.63 .
15 Co 8i 24 B 8f 3.63 .
16 Co 8i 17 B 8f 2.14 .
16 Co 8i 18 B 8f 2.14 .
16 Co 8i 19 B 8f 3.63 .
16 Co 8i 20 B 8f 3.63 .
16 Co 8i 21 B 8f 3.63 .
16 Co 8i 22 B 8f 3.63 .
16 Co 8i 23 B 8f 2.14 .
16 Co 8i 24 B 8f 2.14 .
17 B 8f 18 B 8f 2.10 .
17 B 8f 19 B 8f 5.04 .
17 B 8f 20 B 8f 5.46 .
17 B 8f 21 B 8f 4.16 .
17 B 8f 22 B 8f 3.60 .
17 B 8f 23 B 8f 4.10 .
17 B 8f 24 B 8f 3.53 .
18 B 8f 19 B 8f 5.46 .
18 B 8f 20 B 8f 5.04 .
18 B 8f 21 B 8f 3.60 .
18 B 8f 22 B 8f 4.16 .
18 B 8f 23 B 8f 3.53 .
18 B 8f 24 B 8f 4.10 .
19 B 8f 20 B 8f 2.10 .
19 B 8f 21 B 8f 4.10 .
19 B 8f 22 B 8f 3.53 .
19 B 8f 23 B 8f 4.16 .
19 B 8f 24 B 8f 3.60 .
20 B 8f 21 B 8f 3.53 .
20 B 8f 22 B 8f 4.10 .
20 B 8f 23 B 8f 3.60 .
20 B 8f 24 B 8f 4.16 .
21 B 8f 22 B 8f 2.10 .
21 B 8f 23 B 8f 5.04 .
21 B 8f 24 B 8f 5.46 .
22 B 8f 23 B 8f 5.46 .
22 B 8f 24 B 8f 5.04 .
23 B 8f 24 B 8f 2.10 .
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) = (14, 8, 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

Materials Project: mp-1224984
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