Research/Sitter/MAGNDATA / 1.293_NdNi2B2C.mcif

NdNi₂B₂C

MAGNDATA entry 1.293 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 4.9 K (−268 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2/c BNS 15.90
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 7.356 · b 3.678 · c 20.1628 Å · α 90° · β 90° · γ 90°
Transition	4.87 K (−268 °C)
Measured at	1.5 K
Magnetic ions	Nd
Largest moment component	2.1 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 C_c 2/c →

Atom sites · 4 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Nd1	Nd	0	0	2.1	0	0	2.1
Ni1	Ni	0.5	0.125
B1	B	0	0.1764
C1	C	0	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

J. W. Lynn et al. PHYSICAL REVIEW B (1997) · doi:10.1103/PhysRevB.55.6584

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.293_NdNi2B2C.mcif from MAGNDATA · entry page

sha256 of this copy: 90a702355a3240e5a2679eace310c71e73bbafdd6ae8127340f6fe15088aae60
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.293_NdNi2B2C.mcif.