Research/Sitter/MAGNDATA / 1.65_SrFeO2.mcif

SrFeO₂

MAGNDATA entry 1.65 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 473 K (200 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	F_S m m m BNS 69.526
Point group	mmm1′
Parent space group	P 4/m m m No. 123
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 1/2] 1k
Cell	a 7.982 · b 7.982 · c 6.948 Å · α 90° · β 90° · γ 90°
Transition	473 K (200 °C)
Measured at	293 K
Magnetic ions	Fe
Largest moment component	3.1 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 F_S m m m →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr	Sr	0.25	0.25	0.25
Fe	Fe	0	0	0	3.1	0	0	3.1
O_1	O	0	0.25	0
O_2	O	0.25	0	0

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

Y. Tsujimoto et al. Nature (2007) · doi:10.1038/nature06382

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.65_SrFeO2.mcif from MAGNDATA · entry page

sha256 of this copy: 889c567ec6af0bd325cfe8aa6519540fd576f7af85f521c7f692e616fe377391
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.65_SrFeO2.mcif.