Research/Sitter/MAGNDATA / 1.446_CeCoAl4.mcif

CeCoAl₄

MAGNDATA entry 1.446 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 12.8 K (−260 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_a m c a BNS 64.479
Parent space group	P m m a No. 51
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1/2 1/2] 1k
Cell	a 7.6518 · b 8.0976 · c 13.802 Å · α 90° · β 90° · γ 90°
Transition	12.8 K (−260 °C)
Measured at	1.5 K
Magnetic ions	Ce
Largest moment component	1.29 μ_B
Method	NPD and 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_a m c a →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ce1	Ce	0.25	0	0.1918	0	1.29	0	1.29
Co1	Co	0.25	0	0.4079
Al1	Al	0	0	0
Al2	Al	0.25	0.25	0.0211
Al3	Al	0	0.25	0.3509

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

P. Schobinger-Papamantellos et al. J. Phys.: Condens. Matter (2004) · doi:10.1088/0953-8984/16/36/022

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.446_CeCoAl4.mcif from MAGNDATA · entry page

sha256 of this copy: fffc1b6478ae5675e72e6c901b07e51f307f5418188c1ac3db0454c86df2b462
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.446_CeCoAl4.mcif.