Research/Sitter/MAGNDATA / 1.33_ErAuGe.mcif

ErAuGe

MAGNDATA entry 1.33 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 5 K (−268 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C n a 2₁ BNS 33.154
Point group	mm21′
Parent space group	P 6₃m c No. 186
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 8.7826 · b 4.3913 · c 7.1608 Å · α 90° · β 90° · γ 120°
Transition	5 K (−268 °C)
Measured at	1.5 K
Magnetic ions	Er
Largest moment component	8.8 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_C n a 2₁ →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0	0	0.25	0	0	8.8	8.8
Au1	Au	0.1667	0.6667	0.057
Ge1	Ge	0.1667	0.6667	0.475

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. Baran et al. Journal of Magnetism and Magnetic Materials (2001) · doi:10.1016/s0304-8853(01)00463-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.33_ErAuGe.mcif from MAGNDATA · entry page

sha256 of this copy: 5aba9936901413829dc300063eb6ad791e9aee8abf878723c0bb620df01062c4
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.33_ErAuGe.mcif.