Research/Sitter/MAGNDATA / 1.1.157_Ho3Co.mcif

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Spin lattice of Co1Ho3Spin lattice of Co1Ho3

Co1Ho3

MAGNDATA entry 1.1.157 · 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.
ordered ≤ 21 K (−252 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 11 properties
Magnetic groupPnm′a(α00)000
Point groupmmm1′
Parent space groupP n m a No. 62
Repeats every6.25 cells along a (not a whole number: that's what incommensurate means)
Propagation[0.159992 0 0] 1k
Cella 6.9512 · b 9.2583 · c 6.2519 Å · α 90° · β 90° · γ 90°
Transition21 K (−252 °C)
Measured at3 K
Magnetic ionsCo, Ho
Largest moment component7.46 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 Pnm′a(α00)000 →
Atom sites · 3 sites · CSV
siteelementxyzmambmc|m| (μB)
Ho1Ho0.03740.250.14621.3902.012.4438
Ho2Ho0.18030.06450.6784−1.482.17−0.142.6304
CoCo0.3220.251.052−0.3600.720.805

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

S. Goswami et al.

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.157_Ho3Co.mcif from MAGNDATA · entry page

sha256 of this copy: 58741216f86c02850dc7e21837d8b93003ea62ea89a4a992654650c06d704cc1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.157_Ho3Co.mcif.