Research/Sitter/MAGNDATA / 1.644_EuSn2As2.mcif

EuSn₂As₂

MAGNDATA entry 1.644 · 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 ¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 23.5 K (−250 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_c 2/m BNS 12.63
Point group	2/m1′
Parent space group	R 3 m No. 166
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 3/2] 1k
Cell	a 4.2071 · b 4.2071 · c 52.926 Å · α 90° · β 90° · γ 120°
Transition	23.5 K (−250 °C)
Measured at	4 K
Magnetic ions	Eu
Largest moment component	4.5 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 C_c 2/m →

Atom sites · 3 sites · CSV

site	element	z	m_a	m_b	m_c	\|m\| (μ_B)
Eu1	Eu	0	4.5	0	0	4.5
Sn1	Sn	0.1048
As1	As	0.2031

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. Pakhira et al. PHYSICAL REVIEW B (2021) · doi:10.1103/PhysRevB.104.174427

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.644_EuSn2As2.mcif from MAGNDATA · entry page

sha256 of this copy: 90244538e37c2dd49b823966327f3216a7e4462ae92b618603c396c1ccd07199
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.644_EuSn2As2.mcif.