Research/Sitter/MAGNDATA / 1.310_MnBi4Te7.mcif

MnBi₄Te₇

MAGNDATA entry 1.310 · 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 ≤ 13 K (−260 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_c 3 c 1 BNS 165.96
Parent space group	P 3 m 1 No. 164
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 4.3453 · b 4.3453 · c 47.41 Å · α 90° · β 90° · γ 120°
Transition	13 K (−260 °C)
Measured at	4.5 K
Magnetic ions	Mn
Largest moment component	4.01 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_c 3 c 1 →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0.25	0	0	4.01	4.01
Bi1	Bi	0	0	0.25
Bi2	Bi	0.3333	0.6667	0.0428
Mn2	Mn	0.3333	0.6667	0.0428
Bi3	Bi	0.3333	0.6667	0.1708
Mn3	Mn	0.3333	0.6667	0.1708
Te1	Te	0	0	0
Te2	Te	0.6667	0.3333	0.0793
Te3	Te	0	0	0.1349
Te4	Te	0.3333	0.6667	0.2842

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

⬇ 1.310_MnBi4Te7.mcif from MAGNDATA · entry page

sha256 of this copy: 95f519c817078c3c822673de6995325f80e0cb950473db2b10d1e6ed41d35ab7
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.310_MnBi4Te7.mcif.