Research/Sitter/MAGNDATA / 1.59_KTb3F12.mcif

KTb₃F₁₂

MAGNDATA entry 1.59 · 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 ¹4/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 3.6 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_I 4₂/m BNS 84.58
Point group	4/m1′
Parent space group	I 4/m No. 87
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 0] 1k
Cell	a 7.715 · b 7.715 · c 7.53 Å · α 90° · β 90° · γ 90°
Transition	3.6 K (−270 °C)
Measured at	1.4 K
Magnetic ions	Tb
Largest moment component	6.95 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 P_I 4₂/m →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
K1	K	0	0	0
Tb1	Tb	0	0	0.5
Tb2	Tb	0	0.5	0.25	0	0	6.95	6.95
F1	F	0.3455	0.02	0
F2	F	0.2377	0.0335	0.68

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

M. Guillot et al. Journal of Applied Physics (2002) · doi:10.1063/1.1450828

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.59_KTb3F12.mcif from MAGNDATA · entry page

sha256 of this copy: fa9a76f588a645feb2284a4238f20be428642b0c065a4fa40772f56d66c792e7
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.59_KTb3F12.mcif.