Research/Sitter/MAGNDATA / 1.564_GeCo2O4.mcif

GeCo₂O₄

MAGNDATA entry 1.564 · source

p-wave magnet

Coplanar spins, no net moment, and a translation that reverses every spin: spin splitting that is odd in momentum (p-wave).

ordered ≤ 23.5 K (−250 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2 BNS 5.16
Parent space group	F d 3 m No. 227
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 1/2 1/2] 1k
Cell	a 16.502 · b 16.502 · c 16.502 Å · α 90° · β 90° · γ 90°
Transition	23.5 K (−250 °C)
Measured at	1.5 K
Magnetic ions	Co
Largest moment component	2.135 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_c 2 →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ge1	Ge	0.0625	0.0625	0.0625
Co1_1	Co	0.25	0.25	0.25	1.745	1.745	1.745	3.0224
Co1_2	Co	0.125	0.375	0	2.135	0	−2.135	3.0193
Co1_3	Co	0.375	0	0.125	2.135	0	−2.135	3.0193
O1_1	O	0.125	0.125	0.125
O1_2	O	0.25	0	0.375
O1_3	O	0	0.375	0.25
O1_4	O	0.375	0.25	0

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. Diaz et al. PHYSICAL REVIEW B (2006) · doi:10.1103/PhysRevB.74.092404

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.564_GeCo2O4.mcif from MAGNDATA · entry page

sha256 of this copy: 6f93c796e0b4b0d582f01e5947496ae298900feb992fa8aae4780fabbf512887
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.564_GeCo2O4.mcif.