Research/Sitter/MAGNDATA / 0.302_Sr2Co0.9Mg0.1TeO6.mcif

Sr₂Co_0.9Mg_0.1TeO₆

MAGNDATA entry 0.302 · 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 ²2/²m: 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 2₁/c BNS 14.75
Parent space group	P 2₁/n No. 14
Spins	collinear · 1 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.6278 · b 5.5935 · c 7.9144 Å · α 90° · β 89.95° · γ 90°
Transition	13 K (−260 °C)
Measured at	4 K
Magnetic ions	Co
Largest moment component	1.77 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 2₁/c →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1	Sr	0	0.4922	0.25
Co1	Co	0	0	0.5	0.84	0	1.77	1.9599
Mg1	Mg	0	0	0.5
Te1	Te	0	0	0
O1	O	0.2229	0.2579	0.9739
O2	O	0.5523	0.5	0.7405
O3	O	0.7421	0.2229	0.0261

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

B. Orayech et al. Dalton Trans. (2015) · doi:10.1039/c5dt02026c

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.302_Sr2Co0.9Mg0.1TeO6.mcif from MAGNDATA · entry page

sha256 of this copy: ba1e359ab53746b11e6b9ef1eb5ad561af9a29fb56b5d3b04d3574833382616d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.302_Sr2Co0.9Mg0.1TeO6.mcif.