Research/Sitter/MAGNDATA / 0.639_Mn2Au.mcif

Mn₂Au

MAGNDATA entry 0.639 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered > 1000 K (727 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I m′ m m BNS 71.535
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 3.3295 · b 3.3295 · c 8.5398 Å · α 90° · β 90° · γ 90°
Transition	>1000 K (727 °C)
Measured at	300 K
Magnetic ions	Mn
Largest moment component	4.3 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 I m′ m m →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Au1	Au	0	0	0
Mn1	Mn	0	0	0.3328	0	4.3	0	4.3

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

V.M.T.S. Barthem et al. NATURE COMMUNICATIONS (2013) · doi:10.1038/ncomms3892

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.639_Mn2Au.mcif from MAGNDATA · entry page

sha256 of this copy: 3a37eb2493bfa68d6f70825cf65d05aa18f5b132fe31e9f482aec73954f3ac17
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.639_Mn2Au.mcif.