Research/Sitter/MAGNDATA / 1.1.153_CePtAl3.mcif

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Spin lattice of Al3Ce1Pt1Spin lattice of Al3Ce1Pt1

Al3Ce1Pt1

MAGNDATA entry 1.1.153 · 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 ≤ 3 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 11 properties
Magnetic groupImm21′(α00)0s0s
Point groupmm21′
Parent space groupI4mm No. 107
Repeats every1.48 cells along a (not a whole number: that's what incommensurate means)
Propagation[0.676 0 0] 1k
Cella 4.31 · b 4.31 · c 10.65 Å · α 90° · β 90° · γ 90°
Transition3 K (−270 °C)
Measured at1.5 K
Magnetic ionsCe
Largest moment component0.85 μB
MethodCycloidal magnetic modulation in CePtAl3.

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 Imm21′(α00)0s0s →
Atom sites · 7 sites · CSV
siteelementxyzmambmc|m| (μB)
Ce1Ce000
Pt2Pt000.636
Al2Al000.636
Al3Al000.41
Pt3Pt000.376
Al4_1Al00.50.251
Al4_2Al−0.500.251

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

M. Stekiel et al. Phys. Rev. Res. (2023) · doi:10.1103/PhysRevResearch.6.023117

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.153_CePtAl3.mcif from MAGNDATA · entry page

sha256 of this copy: 96f1c9fda52835e862b6d12d6df17b5b16be52f9f32d256b334054007a5da3b1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.153_CePtAl3.mcif.