Research/Sitter/MAGNDATA / 0.529_Co4Nb2O9.mcif

Co₄Nb₂O₉

MAGNDATA entry 0.529 · 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 ≤ 27 K (−246 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C 2/c′ BNS 15.88
Parent space group	P 3 c 1 No. 165
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.18 · b 5.18 · c 14.163 Å · α 90° · β 90° · γ 120°
Transition	27 K (−246 °C)
Measured at	5 K
Magnetic ions	Co
Largest moment component	3.201 μ_B
Method	NSD

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 C 2/c′ →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0.3333	0.6667	0.018	3.201	2.12	0	2.8204
Co2	Co	0.3333	0.6667	0.8068	3.201	2.12	0	2.8204
Nb1	Nb	0	0	0.3572
O1_1	O	0.296	0	0.25
O1_2	O	0	0.296	0.25
O2_1	O	0.346	0.303	0.0842
O2_2	O	0.697	0.043	0.0842
O2_3	O	0.957	0.654	0.0842

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

L. Ding et al. PHYSICAL REVIEW B (2020) · doi:10.1103/PhysRevB.102.174443

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.529_Co4Nb2O9.mcif from MAGNDATA · entry page

sha256 of this copy: ba489e42185200b460a01aec6e4ed1e5e2fe29f5b0f5c5c3dbc5e0f59ef82dd8
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.529_Co4Nb2O9.mcif.