Research/Sitter/MAGNDATA / 0.13_Ca3Co2-xMnxO6.mcif

Ca₃Co_2−xMnxO₆

MAGNDATA entry 0.13 · source

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.

Spin group ¹3̄²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 16 K (−257 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	R 3c BNS 161.69
Point group	3m
Parent space group	R 3c No. 167
Spins	collinear · 3 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.1314 · b 9.1314 · c 10.5817 Å · α 90° · β 90° · γ 120°
Transition	16 K (−257 °C)
Measured at	1.4 K
Magnetic ions	Co, Mn
Largest moment component	1.93 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 R 3c →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ca	Ca	0.3621	0	0.25
Mn	Mn	0	0	0	0	0	1.93	1.93
Co	Co	0	0	0.25	0	0	0.66	0.66
O1	O	0.1779	0.0247	0.108
O1_2	O	0.358	0.8446	0.0587

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

Y.J. Choi et al. Phys. Rev. Lett. (2008) · doi:10.1103/physrevlett.100.047601

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.13_Ca3Co2-xMnxO6.mcif from MAGNDATA · entry page

sha256 of this copy: f9b70643678b9b936f69f342d2a15ea4ed544aee229cee3b7014e0e2715df970
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.13_Ca3Co2-xMnxO6.mcif.

Ca3Co2−xMnxO6

Symmetry

Source

Original file

Ca₃Co_2−xMnxO₆