Research/Sitter/MAGNDATA / 1.57_CuMnO2.mcif

CuMnO₂

MAGNDATA entry 1.57 · 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 ¹1̄ × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 65 K (−208 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_S 1 BNS 2.7
Point group	11′
Parent space group	C 2/m No. 12
Spins	collinear · net moment 0 μ_B per cell
Propagation	[-1/2 1/2 1/2] 1k
Cell	a 11.1614 · b 5.7598 · c 11.785 Å · α 90.18° · β 103.98° · γ 89.81°
Transition	65 K (−208 °C)
Measured at	10 K
Magnetic ions	Mn
Largest moment component	2.94 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 P_S 1 →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cu1	Cu	0	0.25	0.25
Mn1	Mn	0	0	0	2.94	0	1.76	3.0399
O1	O	0.2031	−0.006	0.0893

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

F. Damay et al. PHYSICAL REVIEW B (2009) · doi:10.1103/physrevb.80.094410

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.57_CuMnO2.mcif from MAGNDATA · entry page

sha256 of this copy: 3e8f7ce3f30f68f899d29b99580417f9f3a7bd7b74fd49b1811443ea55efce4b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.57_CuMnO2.mcif.