Research/Sitter/MAGNDATA / 1.1.150_MnGe.mcif

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Spin lattice of Mn1Ge1Spin lattice of Mn1Ge1

Mn1Ge1

MAGNDATA entry 1.1.150 · source
incommensurate spiral
Incommensurate: the magnetic pattern repeats every so many cells, but not a whole number of them, so it never lines up with the crystal lattice. Here it's a spiral: the spin direction rotates as you move along.
Structure · 9 properties
Magnetic groupP2121211′(0β0)0s0s
Point group2221′
Parent space groupP 21 3 No. 198
Repeats every6.06 cells along b (not a whole number: that's what incommensurate means)
Propagation[0 0.16498 0] 1k
Cella 4.78049 · b 4.78049 · c 4.78049 Å · α 90° · β 90° · γ 90°
Magnetic ionsMn
Largest moment component0.814 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 P2121211′(0β0)0s0s →
Atom sites · 2 sites · CSV
siteelementxyzmambmc|m| (μB)
Ge1Ge0.15670.15670.1567
Mn1Mn0.86160.86160.8616

Incommensurate: the moments are modulated; the picture evaluates each atom's Fourier series at its own phase.

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

V. Pomjakushin et al. Physical Review B” (2023) · doi:10.1103/PhysRevB.107.024410

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.150_MnGe.mcif from MAGNDATA · entry page

sha256 of this copy: 59df6fd70aa0d4e694353bb47f94895991c4aea219edf12f62e8c000f8f8efb3
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.150_MnGe.mcif.