Research/Sitter/MAGNDATA / 1.568_GdCu2Si2.mcif

GdCu₂Si₂

MAGNDATA entry 1.568 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 12.5 K (−261 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2/m BNS 12.63
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 7.844 · b 3.922 · c 19.986 Å · α 90° · β 90° · γ 90°
Transition	12.5 K (−261 °C)
Measured at	2 K
Magnetic ions	Gd
Largest moment component	7.2 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 C_c 2/m →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cu1	Cu	0.5	0.125
Gd1	Gd	0	0	0	7.2	0	7.2
Si1	Si	0	0.184

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

J. M. Barandiaran et al. Journal of Magnetism and Magnetic Materials (1988) · doi:10.1016/0304-8853(88)90299-5

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.568_GdCu2Si2.mcif from MAGNDATA · entry page

sha256 of this copy: d373345b62428f770f5ae525550e7e1397722d26a581061e9c3123cb06e08d01
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.568_GdCu2Si2.mcif.