Material:

Y(MnGe)2

ID:

MMD-3019

Explore database:

Compounds with the same formula: Y(MnGe)2 (1 entry found)
Compounds with the same elements: Y-Mn-Ge (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

139

Hermann-Mauguin

I4/mmm

Hall

-I 4 2

Point group

4/mmm

Structure data:

Normalized formula

Y(MnGe)2

The number of formula units per unit cell

2

The total number of atoms per unit cell

10

The number of inequivalent sites per unit cell

3

Structure search

MP

Lattice parameters:

a (Å)

3.9491

b (Å)

3.9491

c (Å)

10.9112

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

170.168

Density (g/cm3)

6.715

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-479.3 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: Y(MnGe)2

1 entry found

Compounds with the same elements: Y-Mn-Ge

3 entries found

Binary compounds in Y-Mn system

3 entries found

Binary compounds in Y-Ge system

No entries found

Binary compounds in Mn-Ge system

14 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

Ferromagnetic

Total magnetic moment

8.21 μB/cell

Averaged magnetic moment

0.82 μB/atom

Magnetic polarization, Js = μ0Ms

0.56 T (= 445.6 emu/cm3)
LMTO-GF calculations (details)

Curie temperature, TC

DFT calculations (details)

Magnetic easy axis

Magnetic hardness parameter, κ

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

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Y 2a 0.000000 0.000000 0.000000 -0.08 . .
2 Y 2a 0.500000 0.500000 0.500000 -0.08 . .
3 Mn 4d 0.500000 0.000000 0.750000 2.12 . .
4 Mn 4d 0.000000 0.500000 0.750000 2.12 . .
5 Mn 4d 0.000000 0.500000 0.250000 2.12 . .
6 Mn 4d 0.500000 0.000000 0.250000 2.12 . .
7 Ge 4e 0.000000 0.000000 0.619388 -0.07 . .
8 Ge 4e 0.500000 0.500000 0.880612 -0.07 . .
9 Ge 4e 0.500000 0.500000 0.119388 -0.07 . .
10 Ge 4e 0.000000 0.000000 0.380612 -0.07 . .
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 Y 2a 2 Y 2a 6.13 .
1 Y 2a 3 Mn 4d 3.37 .
1 Y 2a 4 Mn 4d 3.37 .
1 Y 2a 5 Mn 4d 3.37 .
1 Y 2a 6 Mn 4d 3.37 .
1 Y 2a 7 Ge 4e 4.15 .
1 Y 2a 8 Ge 4e 3.08 .
1 Y 2a 9 Ge 4e 3.08 .
1 Y 2a 10 Ge 4e 4.15 .
2 Y 2a 3 Mn 4d 3.37 .
2 Y 2a 4 Mn 4d 3.37 .
2 Y 2a 5 Mn 4d 3.37 .
2 Y 2a 6 Mn 4d 3.37 .
2 Y 2a 7 Ge 4e 3.08 .
2 Y 2a 8 Ge 4e 4.15 .
2 Y 2a 9 Ge 4e 4.15 .
2 Y 2a 10 Ge 4e 3.08 .
3 Mn 4d 4 Mn 4d 2.79 .
3 Mn 4d 5 Mn 4d 6.13 .
3 Mn 4d 6 Mn 4d 5.46 .
3 Mn 4d 7 Ge 4e 2.44 .
3 Mn 4d 8 Ge 4e 2.44 .
3 Mn 4d 9 Ge 4e 4.49 .
3 Mn 4d 10 Ge 4e 4.49 .
4 Mn 4d 5 Mn 4d 5.46 .
4 Mn 4d 6 Mn 4d 6.13 .
4 Mn 4d 7 Ge 4e 2.44 .
4 Mn 4d 8 Ge 4e 2.44 .
4 Mn 4d 9 Ge 4e 4.49 .
4 Mn 4d 10 Ge 4e 4.49 .
5 Mn 4d 6 Mn 4d 2.79 .
5 Mn 4d 7 Ge 4e 4.49 .
5 Mn 4d 8 Ge 4e 4.49 .
5 Mn 4d 9 Ge 4e 2.44 .
5 Mn 4d 10 Ge 4e 2.44 .
6 Mn 4d 7 Ge 4e 4.49 .
6 Mn 4d 8 Ge 4e 4.49 .
6 Mn 4d 9 Ge 4e 2.44 .
6 Mn 4d 10 Ge 4e 2.44 .
7 Ge 4e 8 Ge 4e 3.99 .
7 Ge 4e 9 Ge 4e 6.13 .
7 Ge 4e 10 Ge 4e 2.61 .
8 Ge 4e 9 Ge 4e 2.61 .
8 Ge 4e 10 Ge 4e 6.13 .
9 Ge 4e 10 Ge 4e 3.99 .
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) = (None, None, None) 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-20649
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