Research/Sitter/MAGNDATA / 1.125_LaFeAsO.mcif

LaFeAsO

MAGNDATA entry 1.125 · 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 ≤ 135 K (−138 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I_c b c a BNS 73.553
Point group	mmm1′
Parent space group	C m m e No. 67
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 1/2] 1k
Cell	a 5.7063 · b 5.6788 · c 17.419 Å · α 90° · β 90° · γ 90°
Transition	135 K (−138 °C)
Measured at	2 K
Magnetic ions	Fe
Largest moment component	0.63 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 I_c b c a →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
La1	La	0	0.25	0.071
As1	As	0	0.25	0.3252
Fe1	Fe	0.25	0	0.25	0.63	0	0	0.63
O1	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

N. Qureshi et al. PHYSICAL REVIEW B · doi:10.1103/PhysRevB.82.184521

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.125_LaFeAsO.mcif from MAGNDATA · entry page

sha256 of this copy: 51736e48dd1d87b43a3c6e007febfdb97bf61dfba79dcb4ecb6e10f1b783fc7a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.125_LaFeAsO.mcif.