Research/Sitter/MAGNDATA / 1.291_CeAu2Si2.mcif

CeAu₂Si₂

MAGNDATA entry 1.291 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 10 K (−263 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_I 4/m n c BNS 128.410
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 1 1] 1k
Cell	a 4.3005 · b 4.3005 · c 10.2116 Å · α 90° · β 90° · γ 90°
Transition	10 K (−263 °C)
Measured at	5 K
Magnetic ions	Ce
Largest moment component	1.29 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 P_I 4/m n c →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Au1	Au	0.5	0.25
Ce1	Ce	0	0	0	0	1.29	1.29
Si1	Si	0	0.3877

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

B. H. Grier et al. PHYSICAL REVIEW 8 (1984) · doi:10.1103/PhysRevB.29.2664

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.291_CeAu2Si2.mcif from MAGNDATA · entry page

sha256 of this copy: a5fc7c60627a5a1c3988b0301337b065283055d73222f9510f427c6fc599a3c6
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.291_CeAu2Si2.mcif.