Research/Sitter/MAGNDATA / 1.341_TmMnO3.mcif

TmMnO₃

MAGNDATA entry 1.341 · 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 ≤ 32 K (−241 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 9 properties

Magnetic group	P_b m n 2₁ BNS 31.129
Parent space group	P n m a No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 11.6314 · b 7.3218 · c 5.231 Å · α 90° · β 90° · γ 90°
Transition	32 K (−241 °C)
Magnetic ions	Mn, Tm
Largest moment component	3.75 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_b m n 2₁ →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tm1_1	Tm	0.0425	0.25	0.982
Tm1_2	Tm	0.9575	0.75	0.018
Mn1	Mn	0	0	0.5	3.75	0	0	3.75
O1_1	O	0.234	0.25	0.111
O1_2	O	0.766	0.75	0.889
O2_1	O	0.163	0.056	0.704
O2_2	O	0.837	0.556	0.296

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 Y Pomjakushin1 et al. New Journal of Physics (2009) · doi:10.1088/1367-2630/11/4/043019

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.341_TmMnO3.mcif from MAGNDATA · entry page

sha256 of this copy: 4f2520f9eaf238f0fb308f40ff122ba25fbcf3f22957aaa215aa26c9ba5cea1f
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.341_TmMnO3.mcif.