Research/Sitter/MAGNDATA / 1.406_Nd2CuO4.mcif

Nd₂CuO₄

MAGNDATA entry 1.406 · 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 ≤ 30 K (−243 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_A c c m BNS 66.500
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 7.87 · b 7.87 · c 12.14 Å · α 90° · β 90° · γ 90°
Transition	30 K (−243 °C)
Measured at	0.5 K
Magnetic ions	Cu, Nd
Largest moment component	0.92 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 c c m →

Atom sites · 4 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Nd1	Nd	0	0.3516	0.92	0.92	0	1.3011
Cu1	Cu	0	0	0.33	0.33	0	0.4667
O1	O	0.25	0
O2	O	0.25	0.25

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. Chattopadhyay et al. Physica C (1991) · doi:10.1016/0921-4534(91)90482-E

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.406_Nd2CuO4.mcif from MAGNDATA · entry page

sha256 of this copy: 8b92e30724c84d07800c849fbe3def43afd7c791e162fc30620cb8cb8fc030e8
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.406_Nd2CuO4.mcif.