Research/Sitter/MAGNDATA / 0.343_TbGe2.mcif

TbGe₂

MAGNDATA entry 0.343 · 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 ≤ 41 K (−232 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C m′ m m BNS 65.483
Parent space group	C m m m No. 65
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.0964 · b 29.834 · c 3.9877 Å · α 90° · β 90° · γ 90°
Transition	41 K (−232 °C)
Measured at	4.2 K
Magnetic ions	Tb
Largest moment component	9.45 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 m′ m m →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1	Tb	0	0.4363	0	0	0	9.45	9.45
Tb2	Tb	0	0.3098	0.5	0	0	−7.55	7.55
Ge1	Ge	0	0	0
Ge2	Ge	0.5	0	0.5
Ge3	Ge	0	0.1573	0
Ge4	Ge	0	0.2393	0
Ge5	Ge	0	0.1087	0.5

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. Journal of the Less-Common Metals (1988) · doi:10.1016/0022-5088(88)90140-3

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.343_TbGe2.mcif from MAGNDATA · entry page

sha256 of this copy: 4a82f82f76ff4d29d2ad33b3755a81e994b3969d859297b7306202c3cbb7ee1b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.343_TbGe2.mcif.