Research/Sitter/MAGNDATA / 0.50_MnTiO3.mcif

MnTiO₃

MAGNDATA entry 0.50 · 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 ≤ 28 K (−245 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C c′ BNS 9.39
Point group	m′
Parent space group	R 3c No. 161
Spins	collinear · 3 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.1878 · b 5.1878 · c 13.6791 Å · α 90° · β 90° · γ 120°
Transition	28 K (−245 °C)
Measured at	2 K
Magnetic ions	Mn
Largest moment component	3.9 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′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0.284	3.9	0	0	3.9
Ti1	Ti	0	0	0
O1_1	O	0.0602	0.337	0.068
O1_2	O	0.663	0.7232	0.068
O1_3	O	0.2768	0.9398	0.068

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

A.M. Arevalo-Lopez et al. PHYSICAL REVIEW B (2013) · doi:10.1103/physrevb.88.104416

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.50_MnTiO3.mcif from MAGNDATA · entry page

sha256 of this copy: ee302f679b69c89996f615b10e52a5316e74e941608446185cf92421131a8f03
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.50_MnTiO3.mcif.