Research/Sitter/MAGNDATA / 0.1093_La2O3Mn2Se2.mcif

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Spin lattice of La2Mn2O3Se2Spin lattice of La2Mn2O3Se2

La2Mn2O3Se2

MAGNDATA entry 0.1093 · source
d-wave altermagnet
No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion. d-wave: the splitting changes sign twice around the Fermi surface (2 nodal planes).
Spin group ²4/¹m¹m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.
ordered ≤ 163 K (−110 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 11 properties
Magnetic groupI 4′/m m′ m BNS 139.534
Point group4′/mm′m
Parent space groupI 4/m m m No. 139
Spinscollinear · 2 nodal planes · net moment 0 μB per cell
Propagation[0 0 0] 1k
Cella 4.12956 · b 4.12956 · c 18.7793 Å · α 90° · β 90° · γ 90°
Transition163 K (−110 °C)
Measured at6 K
Magnetic ionsMn
Largest moment component4.15 μB
MethodNPD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in I 4′/m m′ m →
Atom sites · 5 sites · CSV
siteelementxyzmambmc|m| (μB)
La1La0.50.50.1865
Mn1Mn00.50004.154.15
Se1Se000.1004
O1O00.50.25
O2O000.5

Moment components are along the crystal axes a, b, c (μB), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

N. Ni et al. PHYSICAL REVIEW B (2010) · doi:10.1103/PhysRevB.82.214419

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1093_La2O3Mn2Se2.mcif from MAGNDATA · entry page

sha256 of this copy: e5b41ab625f4ce7bab2f2b05e18645fd2aabd8df49561e91ff7dbffda5f8ca50
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1093_La2O3Mn2Se2.mcif.