Research/Sitter/MAGNDATA / 2.49_La2O2Fe2OSe2.mcif

La₂O₂Fe₂OSe₂

MAGNDATA entry 2.49 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 89 K (−184 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_a 2/m BNS 12.64
Parent space group	I 4/m m m No. 139
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[-1/2 0 1/2] · [0 1/2 1/2] 2k
Cell	a 8.166 · b 8.166 · c 37.154 Å · α 90° · β 90° · γ 90°
Transition	89 K (−184 °C)
Measured at	2 K
Magnetic ions	Fe
Largest moment component	3.5 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_a 2/m →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0	0.25	0	3.5	0	0	3.5
O1_1	O	0	0.25	0.125
O1_2	O	0.25	0	0.125
O2_1	O	0	0	0.25
O2_2	O	0.25	0.25	0
La1_1	La	0	0	0.3422
La1_2	La	0.25	0.25	0.5922
Se1_1	Se	0	0	0.0478
Se1_2	Se	0.25	0.25	0.2978

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.E. Cox et al. Phys. Rev B (2014) · doi:10.1103/PhysRevB.89.100402

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.49_La2O2Fe2OSe2.mcif from MAGNDATA · entry page

sha256 of this copy: cb50d511d6d6497aa9c50abf360ef35d902a348f80396e23e5408aa5826bb9a1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.49_La2O2Fe2OSe2.mcif.