Research/Sitter/MAGNDATA / 1.511_TbNi2Si2.mcif

TbNi₂Si₂

MAGNDATA entry 1.511 · 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 ≤ 10 K (−263 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_A m c a BNS 64.480
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 7.904 · b 7.904 · c 9.542 Å · α 90° · β 90° · γ 90°
Transition	10 K (−263 °C)
Measured at	4.2 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 m c a →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ni1	Ni	0.25	0.25
Tb1	Tb	0	0	0	0	8.8	8.8
Si1	Si	0	0.372

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

V.N. Nguyen et al. Solid State Communications (1983) · doi:10.1016/0038-1098(83)90378-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.511_TbNi2Si2.mcif from MAGNDATA · entry page

sha256 of this copy: 0a44d7a89ba663f36b9a194975d0ca7188405071fc6fc740691c66e5a7027e91
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.511_TbNi2Si2.mcif.