Research/Sitter/MAGNDATA / 1.104_Gd2CuO4.mcif

Gd₂CuO₄

MAGNDATA entry 1.104 · 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 ≤ 285 K (12 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_A c c m BNS 66.500
Point group	mmm1′
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 7.784 · b 7.784 · c 11.878 Å · α 90° · β 90° · γ 90°
Transition	285 K (12 °C)
Magnetic ions	Cu
Largest moment component	1 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_A c c m →

Atom sites · 4 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Gd1	Gd	0	0.3492
Cu1	Cu	0	0	1	1	0	1.4142
O1	O	0.25	0.25
O2	O	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

T. Chattopadhyay et al. PHYSICAL REVIEW B (1992) · doi:10.1103/PhysRevB.46.5731

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.104_Gd2CuO4.mcif from MAGNDATA · entry page

sha256 of this copy: a91f4d30086817003a3af8d7cbc5a6f87713a9ea3f07cb952d8b07ca3be1f6fd
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.104_Gd2CuO4.mcif.