Research/Sitter/MAGNDATA / 0.475_Sr2TbIrO6.mcif

Sr₂TbIrO₆

MAGNDATA entry 0.475 · 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 ²2/²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 51 K (−222 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 2₁/c BNS 14.75
Parent space group	P 2₁/n No. 14
Spins	collinear · 1 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.7464 · b 5.7461 · c 8.1243 Å · α 90° · β 90.14° · γ 90°
Transition	51 K (−222 °C)
Measured at	2 K
Magnetic ions	Ir, Tb
Largest moment component	6.6 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 P 2₁/c →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1	Sr	0.494	0.53	0.247
Tb1	Tb	0.5	0	0	0	0	6.6	6.6
Ir1	Ir	0.5	0	0.5
O1	O	0.273	0.289	0.031
O2	O	0.213	0.779	0.029
O3	O	0.566	0.985	0.259

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

D. Harada et al. J. Phys.: Condens. Matter (2000) · doi:10.1088/0953-8984/12/14/302

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.475_Sr2TbIrO6.mcif from MAGNDATA · entry page

sha256 of this copy: 27077bb61227fd127aa9ab23f1a49078218179a6fa3d3a2f50280f81ecb50c35
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.475_Sr2TbIrO6.mcif.