Altermagnets Database

Identity

Elements

Mn, Si, N

Space group i Parent crystallographic space-group.

${\mathrm{Pc}}$ (7), ${\mathrm{Pna}2_{1}}$ (33)

MAGNDATA IDs i A screened entry may correspond to one or more entries in the MAGNDATA database.

• 0.1067
• 0.1066

ICSD IDs

200019

Parent space group(s) i Parent nonmagnetic space group(s) reported by the MAGNDATA-based symmetry analysis after Spglib standardisation.

${\mathrm{Pc}}$ (7), ${\mathrm{Pna}2_{1}}$ (33)

References

• 10.1103/PhysRevMaterials.7.104406
• 10.1016/0038-1098(77)91139-5

Properties

KS Gap i The band gap from Kohn-Sham DFT.

2.733 eV

KS Gap Type

Semiconducting

Min abundance i Minimum crustal abundance among the constituent elements, reported in ppm as a simple scarcity proxy.

19.0 ppm

Spin-splitting metrics

$\Delta E^{\mathrm{max}}_{\mathrm{split}}$ i Largest spin splitting within ±3 eV of the Fermi level in the high-throughput calculation.

0.245 eV

$\Delta E^{\mathrm{avg}}_{\mathrm{split}}$ i Brillouin-zone average of the largest spin splitting at each k-point within the same energy window.

0.114 eV

FΔ i Fraction of the sampled Brillouin zone and near-Fermi bands with appreciable spin splitting.

18.8%

Symmetry screening

The summary table shows one row per linked MAGNDATA record and symmetry-precision variant. If a MAGNDATA ID has multiple Spglib symprec values in the source data, it appears on multiple rows. The cards below keep the same expanded per-variant detail view, including wave classification and mismatch metrics.

MAGNDATA ID	Collinearity i Whether the magnetic configuration was collinear in MAGNDATA or constructed from a noncollinear entry.	Phase i Some materials also have non-altermagnetic (AM) phases predicted; AM for altermagnet and FiM for ferrimagnet.	Wave i Symmetry wave-class shorthand derived from the parent and halving-subgroup Laue classes used in the altermagnetism analysis.	SYMPREC i Spglib symmetry tolerance symprec, shown as an exponential base-10 value.	BNS (MCIF) i BNS setting indicated in the source MCIF file.	G	H
0.1067	Based on noncollinear	FiM	s	$10^{-5}$	${\mathrm{Pc}^{\prime}}$ (7.26)	2/m	2/m
0.1067	Based on noncollinear	AM	d	$10^{-1}$	${\mathrm{Pc}^{\prime}}$ (7.26)	mmm	2/m
0.1066	Collinear	AM	d	$10^{-5}$	${\mathrm{Pn}^{\prime}\mathrm{a}2_{1}^{\prime}}$ (33.146)	mmm	2/m

MAGNDATA 0.1067

$\mathrm{MnSiN_{2}}$

Open entry

Collinearity Based on noncollinear

Phase FiM

Wave s

BNS (MCIF) i BNS setting indicated in the source MCIF file.

${\mathrm{Pc}^{\prime}}$ (7.26)

BNS

${\mathrm{Pc}}$ (7.24)

Parent SG

${\mathrm{Pc}}$ (7)

SYMPREC i Spglib symmetry tolerance symprec, shown as an exponential base-10 value.

$10^{-5}$

Connecting element

n/a

G Laue class

2/m

H Laue class

2/m

Spin-angle mismatch

0.2°

Reference links

• 10.1103/PhysRevMaterials.7.104406

MAGNDATA 0.1067

$\mathrm{MnSiN_{2}}$

Open entry

Collinearity Based on noncollinear

Phase AM

Wave d

BNS (MCIF) i BNS setting indicated in the source MCIF file.

${\mathrm{Pc}^{\prime}}$ (7.26)

BNS

${\mathrm{Pna}^{\prime}2_{1}^{\prime}}$ (33.147)

Parent SG

${\mathrm{Pna}2_{1}}$ (33)

SYMPREC i Spglib symmetry tolerance symprec, shown as an exponential base-10 value.

$10^{-1}$

Connecting element

$C_{2z}$

G Laue class

mmm

H Laue class

2/m

Spin-angle mismatch

0.2°

Reference links

• 10.1103/PhysRevMaterials.7.104406

MAGNDATA 0.1066

$\mathrm{MnSiN_{2}}$

Open entry

Collinearity Collinear

Phase AM

Wave d

BNS (MCIF) i BNS setting indicated in the source MCIF file.

${\mathrm{Pn}^{\prime}\mathrm{a}2_{1}^{\prime}}$ (33.146)

BNS

${\mathrm{Pna}^{\prime}2_{1}^{\prime}}$ (33.147)

Parent SG

${\mathrm{Pna}2_{1}}$ (33)

SYMPREC i Spglib symmetry tolerance symprec, shown as an exponential base-10 value.

$10^{-5}$

Connecting element

$C_{2z}$

G Laue class

mmm

H Laue class

2/m

Spin-angle mismatch

0.0°

Reference links

• 10.1016/0038-1098(77)91139-5

Notes and warnings

• Symmetry-disconnected spin lattices or missing connection symop; Symmetry-disconnected spin lattices
• Spglib mcif symmetry mismatch