Material:

MnAl2Co

ID:

MMD-2560

Explore database:

Compounds with the same formula: MnAl2Co (1 entry found)
Compounds with the same elements: Mn-Al-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

MnAl2Co

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)

2.8539

b (Å)

2.8539

c (Å)

6.0460

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

49.242

Density (g/cm3)

5.660

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-421.5 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: MnAl2Co

1 entry found

Compounds with the same elements: Mn-Al-Co

3 entries found

Binary compounds in Mn-Al system

11 entries found

Binary compounds in Mn-Co system

4 entries found

Binary compounds in Al-Co system

9 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

1.82 μB/cell

Averaged magnetic moment

0.46 μB/atom

Magnetic polarization, Js = μ0Ms

0.43 T (= 342.2 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic anisotropy constant, Ka-c

0.82 MJ/m3 (= 0.25 meV/cell)

Magnetic easy axis

c

Magnetic hardness parameter, κ

2.33

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Mn 1b 0.000000 0.000000 0.500000 2.06 . .
2 Al 2h 0.500000 0.500000 0.234109 -0.02 . .
3 Al 2h 0.500000 0.500000 0.765891 -0.02 . .
4 Co 1a 0.000000 0.000000 0.000000 -0.26 . .
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 Mn 1b 2 Al 2h 2.58 .
1 Mn 1b 3 Al 2h 2.58 .
1 Mn 1b 4 Co 1a 3.02 .
2 Al 2h 3 Al 2h 2.83 .
2 Al 2h 4 Co 1a 2.46 .
3 Al 2h 4 Co 1a 2.46 .
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-1221642
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