Research/Sitter/MAGNDATA / 1.309_MnBi2Te4.mcif

MnBi₂Te₄

MAGNDATA entry 1.309 · 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 4.3336 · b 4.3336 · c 81.852 Å · α 90° · β 90° · γ 120°
Transition	24 K (−249 °C)
Measured at	4.5 K
Magnetic ions	Mn
Largest moment component	4.7 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 R_I 3c →

Atom sites · 6 sites · CSV

site	element	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	4.7	4.7
Bi1	Bi	0
Bi2	Bi	0.2124
Mn2	Mn	0.2124
Te1	Te	0.0667
Te2	Te	0.147

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

L. Ding et al. PHYSICAL REVIEW B (2020) · doi:10.1103/PhysRevB.101.020412

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.309_MnBi2Te4.mcif from MAGNDATA · entry page

sha256 of this copy: 09848e3191005988794dc0df5b68e4b8e01b1d45fba51a271c1a57b0cbb92317
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.309_MnBi2Te4.mcif.