Research/Sitter/MAGNDATA / 1.0.12_UAu2Si2.mcif

UAu₂Si₂

MAGNDATA entry 1.0.12 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 20 K (−253 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I m′ m′ m BNS 71.536
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 1.8 μ_B per cell
Propagation	[2/3 0 0] 1k
Cell	a 12.6 · b 4.2 · c 10.26 Å · α 90° · β 90° · γ 90°
Transition	20 K (−253 °C)
Measured at	2 K
Magnetic ions	U
Largest moment component	0.9 μ_B
Method	NSD single crystal and NMR

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 I m′ m′ m →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
U1_1	U	0	0	0	0	0	−0.9	0.9
U1_2	U	0.1667	0.5	0.5	0	0	0.9	0.9
Au1_1	Au	0	0.5	0.25
Au1_2	Au	0.1667	0	0.25
Si1_1	Si	0	0	0.389
Si1_2	Si	0.1667	0.5	0.889

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

C. Tabata et al. PHYSICAL REVIEW B (2017) · doi:10.1103/PhysRevB.96.214442

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.0.12_UAu2Si2.mcif from MAGNDATA · entry page

sha256 of this copy: 9160d865952eb52d237794ee4fd4bdd2e47f9f31c2003b623e089ccf542e014b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.0.12_UAu2Si2.mcif.