Research/Sitter/MAGNDATA / 0.306_GaFeO3.mcif

GaFeO₃

MAGNDATA entry 0.306 · 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 ≤ 408 K (135 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C c′ BNS 9.39
Parent space group	R 3 c No. 161
Spins	collinear · 3 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.0187 · b 5.0187 · c 13.5879 Å · α 90° · β 90° · γ 120°
Transition	408 K (135 °C)
Measured at	293 K
Magnetic ions	Fe
Largest moment component	2.15 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 · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ga1	Ga	0	0	0
Fe1	Fe	0	0	0	2.15	0	0	2.15
Ga2	Ga	0	0	0.2892
Fe2	Fe	0	0	0.2892	1.03	0	0	1.03
O1_1	O	0.3026	0.9954	0.892
O1_2	O	0.0046	0.3072	0.892
O1_3	O	0.6928	0.6974	0.892

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

H. Niu et al. J. Am. Chem. Soc. (2017) · doi:10.1021/jacs.6b11128

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.306_GaFeO3.mcif from MAGNDATA · entry page

sha256 of this copy: c732a1d9610481b346d93eda3198853f30815c0277454fd9cd047e7d3261953a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.306_GaFeO3.mcif.