Research/Sitter/MAGNDATA / 0.1176_TbPt6Al3.mcif

TbPt₆Al₃

MAGNDATA entry 0.1176 · source

altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion.

Spin group ¹3̄²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 3.5 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	R 3 c BNS 167.103
Point group	3m1
Parent space group	R 3 c No. 167
Spins	collinear · 3 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.50527 · b 7.50527 · c 38.8018 Å · α 90° · β 90° · γ 120°
Transition	3.5 K (−270 °C)
Measured at	0.7 K
Magnetic ions	Tb
Largest moment component	4.89 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 R 3 c →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1	Tb	0	0	0.0839	0	0	4.89	4.89
Pt1	Pt	0.2122	0	0.25
Pt2	Pt	0	0	0
Pt3	Pt	0	0	0.1626
Pt4	Pt	0.3443	0.0141	0.0389
Al1	Al	0.3485	0.0017	0.1917

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

R. Oishi et al. Phys. Rev. B (2025) · doi:10.1103/z1dg-d5fx

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1176_TbPt6Al3.mcif from MAGNDATA · entry page

sha256 of this copy: ca25359740ef75d39ae1b25c2dd52e71d9ea47cfc325e47796b39eb7ad310e9c
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1176_TbPt6Al3.mcif.