Research/Sitter/MAGNDATA / 1.179_NdCoAsO.mcif

NdCoAsO

MAGNDATA entry 1.179 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 14 K (−259 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_a n m a BNS 62.450
Point group	mmm1′
Parent space group	P 4/n m m No. 129
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 3.98237 · b 3.98237 · c 16.6246 Å · α 90° · β 90° · γ 90°
Transition	14 K (−259 °C)
Measured at	0.3 K
Magnetic ions	Co, Nd
Largest moment component	1.39 μ_B
Method	A ferromagnetic state emerges near 69 K with a small saturation moment of about 0.2 mB on Co atoms.

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 n m a →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Nd	Nd	0.25	0.25	0.0711	1.39	0	0	1.39
Co	Co	0.75	0.25	0.25	−0.32	0	0	0.32
As	As	0.25	0.25	0.3251
O	O	0.75	0.25	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

M.A. McGuire et al. Phys. Rev. B (2010) · doi:10.1103/PhysRevB.81.104405

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.179_NdCoAsO.mcif from MAGNDATA · entry page

sha256 of this copy: 8ac3a5a4da5e71612013499fe92ec8ad77be212d0fd887afe4e2c3be67f68f1e
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.179_NdCoAsO.mcif.