Research/Sitter/MAGNDATA / 1.23_La2CuO4.mcif

La₂CuO₄

MAGNDATA entry 1.23 · 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 ≤ 50 K (−223 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	′P_A c c n′ BNS 56.374
Point group	mmm1′
Parent space group	C m c e No. 64
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 0] 1k
Cell	a 5.357 · b 13.148 · c 5.406 Å · α 90° · β 90° · γ 90°
Transition	50 K (−223 °C)
Measured at	10 K
Magnetic ions	Cu
Largest moment component	0.17 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 ′P_A c c n′ →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cu1	Cu	0	0	0	0	0	0.17	0.17
La1	La	0	0.3611	0.0046
O1	O	0.25	−0.0051	0.25
O2	O	0	0.183	−0.0243

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

T. Freltoft et al. PHYSICAL REVIEW B (1987) · doi:10.1103/physrevb.36.826

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.23_La2CuO4.mcif from MAGNDATA · entry page

sha256 of this copy: c17e2a089380c49facf95d28cebcde8168bb30668d817e8daf4ec5c6ddbb2512
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.23_La2CuO4.mcif.