Research/Sitter/MAGNDATA / 0.1124_ErB4.mcif

Er₁B₄

MAGNDATA entry 0.1124 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 15.4 K (−258 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P b′ a m BNS 55.355
Point group	m′mm
Parent space group	P 4/m b m No. 127
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.0779 · b 7.0779 · c 4.0037 Å · α 90° · β 90° · γ 90°
Transition	15.4 K (−258 °C)
Measured at	1.8 K
Magnetic ions	Er
Largest moment component	8.8 μ_B
Method	NSD

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 b′ a m →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0.3193	0.8193	0	0	0	8.8	8.8
B1	B	0	0	0.2045
B2	B	0.0849	0.5849	0.5
B3_1	B	0.1767	0.04	0.5
B3_2	B	0.96	0.1767	0.5

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

Simon Flury et al. PHYSICAL REVIEW B (2025) · doi:10.1103/m3wx-4v6k

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1124_ErB4.mcif from MAGNDATA · entry page

sha256 of this copy: 3f8a3ed5f885d3f788c35c706717592db524a9df4e34344b1aabfc90cd89c33b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1124_ErB4.mcif.

Er1B4

Symmetry

Source

Original file

Er₁B₄