Research/Sitter/MAGNDATA / 1.417_Tb2O2Se.mcif

Tb₂O₂Se

MAGNDATA entry 1.417 · 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 ≤ 7 K (−266 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2/c BNS 15.90
Parent space group	P 3 m 1 No. 164
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1/2 1/2] 1k
Cell	a 3.876 · b 6.713 · c 13.718 Å · α 90° · β 90° · γ 90°
Transition	7 K (−266 °C)
Measured at	1.5 K
Magnetic ions	Tb
Largest moment component	5.6 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_c 2/c →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1	Tb	0.3333	0.1455	0	3.3	5.6	6.5
S1	S	0	0
O1	O	0.3333	0.314

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

Y. Abbas et al. Solid State Communications (1973) · doi:10.1016/0038-1098(73)90021-5

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.417_Tb2O2Se.mcif from MAGNDATA · entry page

sha256 of this copy: 68e7a37793a2f27a079114c607ef94a5b6df1e86b41a5262d9559f0ade342513
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.417_Tb2O2Se.mcif.