Material:

Al2FeCo

ID:

MMD-2661

Explore database:

Compounds with the same formula: Al2FeCo (2 entries found)
Compounds with the same elements: Al-Fe-Co (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

tetragonal

Space group number

123

Hermann-Mauguin

P4/mmm

Hall

-P 4 2

Point group

4/mmm

Structure data:

Normalized formula

Al2FeCo

The number of formula units per unit cell

1

The total number of atoms per unit cell

4

The number of inequivalent sites per unit cell

3

Structure search

MP

Lattice parameters:

a (Å)

2.8645

b (Å)

2.8645

c (Å)

5.7337

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

47.046

Density (g/cm3)

5.956

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-467.1 meV/atom

Formation energy above hull

0 meV, (stable)

Phase diagram:

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

Related structures:

Compounds with the same formula: Al2FeCo

2 entries found

Compounds with the same elements: Al-Fe-Co

3 entries found

Binary compounds in Al-Fe system

10 entries found

Binary compounds in Al-Co system

9 entries found

Binary compounds in Fe-Co system

11 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

0.51 μB/cell

Averaged magnetic moment

0.13 μB/atom

Magnetic polarization, Js = μ0Ms

0.13 T (= 103.5 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic anisotropy constant, Ka-c

-0.10 MJ/m3 (= -0.03 meV/cell)

Magnetic easy axis

ab plane

Magnetic hardness parameter, κ

2.79

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Al 2g 0.000000 0.000000 0.749785 -0.01 . .
2 Al 2g 0.000000 0.000000 0.250215 -0.01 . .
3 Fe 1d 0.500000 0.500000 0.500000 0.60 . .
4 Co 1c 0.500000 0.500000 0.000000 -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 Al 2g 2 Al 2g 2.86 .
1 Al 2g 3 Fe 1d 2.48 .
1 Al 2g 4 Co 1c 2.48 .
2 Al 2g 3 Fe 1d 2.48 .
2 Al 2g 4 Co 1c 2.48 .
3 Fe 1d 4 Co 1c 2.87 .
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) = (22, 22, 10) 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-1228905
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