Research/Sitter/MAGNDATA / 1.308_MnBi2Te4.mcif

MnBi₂Te₄

MAGNDATA entry 1.308 · 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 ≤ 24 K (−249 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	R_I 3c BNS 167.108
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 4.309 · b 4.309 · c 81.358 Å · α 90° · β 90° · γ 120°
Transition	24 K (−249 °C)
Measured at	10 K
Magnetic ions	Mn
Largest moment component	4.04 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 R_I 3c →

Atom sites · 4 sites · CSV

site	element	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	4.04	4.04
Bi1	Bi	0.2124
Te1	Te	0.0662
Te2	Te	0.1472

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

J.-Q. Yan et al. PHYSICAL REVIEW MATERIALS (2019) · doi:10.1103/PhysRevMaterials.3.064202

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.308_MnBi2Te4.mcif from MAGNDATA · entry page

sha256 of this copy: e9981e6cad9563b4afc04869f7b8dd7789b75f061a260d070ca1f296ed30b587
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.308_MnBi2Te4.mcif.