Research/Sitter/MAGNDATA / 1.791_La0.4Na0.6Fe2As2.mcif

La_0.4Na_0.6Fe₂As₂

MAGNDATA entry 1.791 · 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 ≤ 128 K (−145 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_A m c a BNS 64.480
Point group	mmm1′
Parent space group	I 4/m m m No. 69
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 5.4697 · b 5.474 · c 12.068 Å · α 90° · β 90° · γ 90°
Transition	128 K (−145 °C)
Measured at	5 K
Magnetic ions	Fe
Largest moment component	0.7 μ_B
Method	NSD

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 m 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	0
Na1	Na	0	0	0
Fe1	Fe	0.25	0.25	0.25	−0.7	0	0	0.7
As1	As	0	0	0.6356

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

J.-Q. Yan et al. PHYSICAL REVIEW B (2015) · doi:10.1103/PhysRevB.91.024501

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.791_La0.4Na0.6Fe2As2.mcif from MAGNDATA · entry page

sha256 of this copy: 73b4a8d210e3a03cf3bea7003873f29794e34d8dd2ffdb5afbc509ecd3b8c9df
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.791_La0.4Na0.6Fe2As2.mcif.