Research/Sitter/MAGNDATA / 1.476_Ba2CoO4.mcif

Ba₂CoO₄

MAGNDATA entry 1.476 · 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 ≤ 25 K (−248 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_a 2₁/c BNS 14.80
Parent space group	P 2₁/n No. 14
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 11.8383 · b 7.6283 · c 20.8457 Å · α 90° · β 91.27° · γ 90°
Transition	25 K (−248 °C)
Measured at	1.8 K
Magnetic ions	Co
Largest moment component	2.97 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_a 2₁/c →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0.3738	0.2756	0.0399	2.97	−1.13	−1.3	3.4582
Ba1	Ba	0.3774	0.8508	0.0411
Ba2	Ba	0.1212	0.4919	0.095
O1	O	0.381	0.5079	0.0411
O2	O	0.2552	0.1992	0.0823
O3	O	0.0004	0.179	0.0722
O4	O	0.3592	0.186	0.4598

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

G. Ryu et al. Phys. Status Solidi RRL (2019) · doi:10.1002/pssr.201800537

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.476_Ba2CoO4.mcif from MAGNDATA · entry page

sha256 of this copy: 365115aa41dacb7351acc3cee79082cb308070469c73c3b21f09eb2cffe058ba
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.476_Ba2CoO4.mcif.