Research/Sitter/MAGNDATA / 1.28_CrN.mcif

CrN

MAGNDATA entry 1.28 · 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 ≤ 273 K (−0 °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	F m 3m No. 225
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 8.26 · b 8.26 · c 4.13 Å · α 90° · β 90° · γ 90°
Transition	273 K (−0 °C)
Measured at	77 K
Magnetic ions	Cr
Largest moment component	1.7 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 P_a n m a →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cr1	Cr	0	0	0	1.7	−1.7	0	2.4042
N1	N	0	0.75	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

L.M. Corliss et al. PHYSICAL REVIEW (1960) · doi:10.1103/physrev.117.929

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.28_CrN.mcif from MAGNDATA · entry page

sha256 of this copy: 37151c5763d7d5929d35dd39f16e96488c8676a6fbb542a0a379bfd164f5e855
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.28_CrN.mcif.