Research/Sitter/MAGNDATA / 0.800_MnTe.mcif

MnTe

MAGNDATA entry 0.800 · source

g-wave altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion. g-wave: 4 nodal planes.

Spin group ²6/²m¹m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 323 K (50 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C m c m BNS 63.457
Point group	mmm
Parent space group	P 6₃/m m c No. 194
Spins	collinear · 4 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.1475 · b 4.1475 · c 6.71 Å · α 90° · β 90° · γ 120°
Transition	323 K (50 °C)
Measured at	163 K
Magnetic ions	Mn
Largest moment component	4.6 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 m c m →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	4.6	4.6	0	4.6
Te1	Te	0.3333	0.6667	0.25

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

N. Kunitomi et al. Journal de Physique (1964) · doi:10.1051/jphys:01964002505056800

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.800_MnTe.mcif from MAGNDATA · entry page

sha256 of this copy: 6a8377dc2c9bf94a0ed81b33362a1138633dfe40aad78183a557217f3f25b5f0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.800_MnTe.mcif.