Research/Sitter/MAGNDATA / 2.24_Ba2CoO2Ag2Se2.mcif

Ba₂CoO₂Ag₂Se₂

MAGNDATA entry 2.24 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 180 K (−93 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_C 4₂/n BNS 86.73
Parent space group	I 4/m m m No. 139
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] · [1/2 -1/2 0] 2k
Cell	a 5.9605 · b 5.9605 · c 20.0193 Å · α 90° · β 90° · γ 90°
Transition	180 K (−93 °C)
Measured at	5 K
Magnetic ions	Co
Largest moment component	3.89 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_C 4₂/n →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ba1	Ba	0	0	0.4123
Co1	Co	0	0	0	3.89	0.8	0	3.9714
O1_1	O	0.25	0.25	0
O1_2	O	0.25	0.75	0
Ag1_1	Ag	0.25	0.25	0.25
Ag1_2	Ag	0.25	0.75	0.25
Se1	Se	0	0	0.1619

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

S.J. Herkelrath et al. J. Solid State Chem. (2018) · doi:10.1016/j.jssc.2018.05.018

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.24_Ba2CoO2Ag2Se2.mcif from MAGNDATA · entry page

sha256 of this copy: f844ce162c4eed3539b7f30ae36fb60bfe4b9d649afff01385c32df5dc7bafd2
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.24_Ba2CoO2Ag2Se2.mcif.