Material:

FeCoSe2

ID:

MMD-2614

Explore database:

Compounds with the same formula: FeCoSe2 (1 entry found)
Compounds with the same elements: Fe-Co-Se (6 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

trigonal

Space group number

164

Hermann-Mauguin

P-3m1

Hall

-P 3 2"

Point group

-3m

Structure data:

Normalized formula

FeCoSe2

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)

3.5807

b (Å)

3.5807

c (Å)

5.2374

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

120.000

Volume (Å3)

58.154

Density (g/cm3)

7.787

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-65.9 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: FeCoSe2

1 entry found

Compounds with the same elements: Fe-Co-Se

6 entries found

Binary compounds in Fe-Co system

11 entries found

Binary compounds in Fe-Se system

15 entries found

Binary compounds in Co-Se system

11 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

1.25 μB/cell

Averaged magnetic moment

0.31 μB/atom

Magnetic polarization, Js = μ0Ms

0.25 T (= 198.9 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic anisotropy constant, Ka-c

1.81 MJ/m3 (= 0.66 meV/cell)

Magnetic easy axis

c

Magnetic hardness parameter, κ

5.50

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Fe 1a 0.000000 0.000000 0.000000 1.30 . .
2 Co 1b 0.000000 0.000000 0.500000 -0.06 . .
3 Se 2d 0.333333 0.666667 0.247899 -0.01 . .
4 Se 2d 0.666667 0.333333 0.752101 -0.01 . .
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 1a 2 Co 1b 2.62 .
1 Fe 1a 3 Se 2d 2.44 .
1 Fe 1a 4 Se 2d 2.44 .
2 Co 1b 3 Se 2d 2.45 .
2 Co 1b 4 Se 2d 2.45 .
3 Se 2d 4 Se 2d 3.32 .
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) = (20, 20, 12) 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-1224966
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