Research/Sitter/MAGNDATA / 1.1.33_CeAuAl3.mcif

CeAuAl₃

MAGNDATA entry 1.1.33 · 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 ≤ 1.2 K (−272 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I41′(00γ)qs
Point group	41′
Parent space group	I 4m m No. 107
Repeats every	1.92 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.52] 1k
Cell	a 4.3172 · b 4.3172 · c 10.809 Å · α 90° · β 90° · γ 90°
Transition	1.2 K (−272 °C)
Measured at	0.3 K
Magnetic ions	Ce
Largest moment component	1.05 μ_B
Method	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 I41′(00γ)qs →

Atom sites · 4 sites · CSV

site	element	y	z
Ce1	Ce	0	0
Au1	Au	0	0.631
Al1	Al	0	0.407
Al2	Al	0.5	0.258

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

D.T. Adroja et al. PHYSICAL REVIEW B (2015) · doi:10.1103/PhysRevB.91.134425

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.33_CeAuAl3.mcif from MAGNDATA · entry page

sha256 of this copy: e6abb9dbe63e81d3204834942c1415351def6a202da09ed164852c00d16e0902
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.33_CeAuAl3.mcif.