Research/Sitter/MAGNDATA / 0.14_Gd5Ge4.mcif

Gd₅Ge₄

MAGNDATA entry 0.14 · 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 ≤ 127 K (−146 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n m′ a BNS 62.444
Point group	m′mm
Parent space group	P n m a No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.689 · b 14.8196 · c 7.78 Å · α 90° · β 90° · γ 90°
Transition	127 K (−146 °C)
Magnetic ions	Gd
Largest moment component	1 μ_B
Method	XRMS

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 P n m′ a →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Gd1	Gd	0.2927	0.25	0.0022	0	0	1	1
Gd2	Gd	−0.0237	0.0997	0.1811	0	0	1	1
Gd3	Gd	0.3787	0.8821	0.1629	0	0	1	1
Ge1	Ge	0.1712	0.25	0.3688
Ge2	Ge	0.9157	0.25	0.884
Ge3	Ge	0.218	0.9553	0.473

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. Tan et al. PHYSICAL REVIEW B (2005) · doi:10.1103/physrevb.71.214408

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.14_Gd5Ge4.mcif from MAGNDATA · entry page

sha256 of this copy: 54685edb24c0a6b8e8caa79046138462f5c3d24bdb26babed7fadf0736e2be62
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.14_Gd5Ge4.mcif.