Research/Sitter/MAGNDATA / 1.770_Tb2Ni2In.mcif

Tb₂Ni₂In

MAGNDATA entry 1.770 · 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 ≤ 40 K (−233 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_a 2/m BNS 12.64
Point group	2/m1′
Parent space group	C m m m No. 65
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 1/2] 1k
Cell	a 7.8484 · b 28.374 · c 7.4052 Å · α 90° · β 90° · γ 90°
Transition	40 K (−233 °C)
Measured at	1.55 K
Magnetic ions	Tb
Largest moment component	8.8 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_a 2/m →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1	Tb	0.182	0.25	0	0	8.8	8.8
Ni1	Ni	0.0988	0
In1	In	0	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

S. Baran et al. Acta Cryst. B (2023) · doi:10.1107/S2052520623006315

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.770_Tb2Ni2In.mcif from MAGNDATA · entry page

sha256 of this copy: cdbc8e1df7761cfbfe44633337d07b09aa2cf4741b657961e18237e637793678
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.770_Tb2Ni2In.mcif.