Research/Sitter/MAGNDATA / 1.1.121_ScFeGe.mcif

ScFeGe

MAGNDATA entry 1.1.121 · 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 ≤ 36 K (−237 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P3211′(0,0,γ)-t00s
Point group	321′
Parent space group	P 6 2 m No. 189
Repeats every	5.18 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.193] 1k
Cell	a 6.5429 · b 6.5429 · c 3.8915 Å · α 90° · β 90° · γ 120°
Transition	36 K (−237 °C)
Measured at	4 K
Magnetic ions	Fe
Largest moment component	0.612 μ_B
Method	NSD and NPD

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 P3211′(0,0,γ)-t00s →

Atom sites · 4 sites · CSV

site	element	x	y	z
Fe1	Fe	0.7698	0.7698	0
Sc1	Sc	0.4196	0.4196	0.5
Ge1	Ge	0	0	0.5
Ge2	Ge	0.6667	0.3333	0

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 (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

S. K. Karna et al. PHYSICAL REVIEW B (2021) · doi:10.1103/PhysRevB.103.014443

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.121_ScFeGe.mcif from MAGNDATA · entry page

sha256 of this copy: 19dd85432641825ff6a53e3da5f862f3a179da725c9ded2b79bfce35a90a22b2
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.121_ScFeGe.mcif.